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Pack (Generated Block)

Generated Simscape model of battery pack

Since R2022b

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  • Pack custom block

Description

The Pack block is a custom generated subsystem model of a battery pack. You can create this Simscape™ subsystem by using the buildBattery function with a Pack object as an input argument. The Pack subsystem block is inside the Simulink library that you specify in the LibraryName argument of the buildBattery function.

Note

To allow for structural changes and further customization, when you add the Pack (Generated Block) masked library block from the parent library to a Simulink® model, the linked block does not contain the link or path to the parent library block. If you modify any of the battery structural properties, such as NumSeriesAssemblies or NumParallelCells, you must rebuild the original parent library and copy the block in your model again.

For more information about parent and linked blocks, see Linked Blocks.

The Pack subsystem model comprises six major sections.

  • The Battery Module Assemblies section displays all the ModuleAssembly subsystems defined in the Pack object. This section contains all the series and parallel electrical circuit connections between the module assemblies, as well as the additional connections to the main electrical terminals and the ModuleAssembly-to-thermal boundary conditions. If you require additional non-ModuleAssembly resistances, then the function adds and connects two additional electrical resistors here.

  • The Output signals section groups the output of each ModuleAssembly subsystem into a single multiplexed output signal for the Pack subsystem.

  • The Thermal Boundary Conditions section contains the thermal boundary conditions for each ModuleAssembly subsystem. The buildBattery function adds a connector port from the thermal domain and routes it to every ModuleAssembly subsystem according to the specified thermal boundary conditions. This section is optional and only appears if you define an ambient or coolant thermal path in the Pack object.

  • The Balancing Signals section contains the routing of the cell balancing control signal from the battery management system to every ModuleAssembly subsystem. Selector blocks route the correct elements of the control signal to their corresponding ParallelAssembly blocks.

  • The Coolant Thermal Liquid section contains the thermal liquid network manifold for the coolant that circulates inside the battery cooling plates. This section is optional and only appears if you define a cooling plate in the Pack object.

  • The Cell Outputs section groups each output of the cell model block into a corresponding multiplexed output signal for the Pack subsystem.

Battery Module Assemblies

This figure shows the Battery Module Assemblies section for a Pack subsystem made of four battery module assemblies.

Output Signals

This figure shows the Output Signals section for a Pack subsystem made of four battery module assemblies.

Thermal Boundary Conditions

This figure shows the Thermal Boundary Conditions section for a Pack subsystem made of four battery module assemblies.

Balancing Signals

This figure shows the Balancing Signals section for a Pack subsystem made of four battery module assemblies.

Coolant Thermal Liquid

This figure shows the Coolant Thermal Liquid section for a Pack subsystem made of four battery module assemblies.

Examples

Build Simple Model of Battery Pack in MATLAB and Simscape

Build Simple Model of Battery Pack in MATLAB and Simscape

Create and build a Simscape system model of a battery pack with Simscape Battery™.

Build Detailed Model of Battery Pack from Pouch Cells

Build Detailed Model of Battery Pack from Pouch Cells

Create and build Simscape™ system models for various battery designs and configurations based on pouch battery cells in Simscape™ Battery™. The buildBattery function allows you to automatically generate Simscape models for these Simscape Battery objects:

Ports

Input

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Switch control port for the balancing strategy, specified as a scalar.

Dependencies

To enable this port, set the BalancingStrategy property of the Pack object to "Passive".

Output

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Note

The names of the output ports depend on the block you have specified in the CellModelOptions property of the underlying Cell object that constitutes this pack.

The names of the output ports in this page refer to a Cell object with the Battery (Table-Based) block as the cell component model block. If you specify a custom block for the cell component model, the names of the output ports might differ.

Note

The output ports of this block depend on the Simscape cell model block you used to create the battery object associated with this block. If the Simscape cell model block has output ports, the Battery Builder forwards these output ports to all the parent generated blocks of which the battery object is a subcomponent.

For example, if you create a custom Simscape cell model block with a Voltage output port and eventually use it to create this block, then this block has a Voltage output port. For more information about custom cell model blocks, see the CellModelBlockPath property of the CellModelBlock object.

Current at the cell level. The original signal units from the Module block are Amperes. The size of this signal is equal to the total number of electrical models in the system.

Cell-level number of cycles related to battery aging. The original signal units from the Module block are unitless. The size of this signal is equal to the total number of electrical models in the system.

State of charge at the cell level. The original signal units from the Module block are unitless and the value typically varies between 0 and 1. The size of this signal is equal to the total number of electrical models in the system.

State of charge at the parallel assembly level. The original signal units from the Module block are unitless and the value typically varies between 0 and 1. The size of this signal is equal to the total number of parallel assemblies in the module assembly.

Temperature at the cell level. The original signal units from the Module block are kelvin. The size of this signal is equal to the total number of electrical models in the system.

Dependencies

To enable this port, enable the thermal port of the cells that comprise the pack. To model the thermal port of the cells, in the CellModelBlock property of the cells, set the thermal_port parameter of the BlockParameters property to "Model".

Voltages at the cell level. The original signal units from the Module block are volts. The size of this signal is equal to the total number of electrical models in the system.

Voltages at the parallel assembly level. The original signal units from the Module block are volts. The size of this signal is equal to the total number of parallel assemblies in the pack. Use this signal as an input to the battery management system (BMS) blocks of Simscape Battery.

Since R2023a

Vector that contains the plate temperature, the fluid pressure drop, and the fluid temperature change of each cooling plate in the model. The size of this port depends on the number of cooling plates in the model.

Dependencies

To enable this port, set the CoolingPlate property of the Pack object to either "Top" or "Bottom".

Since R2024b

State of charge at cell level, specified as a scalar or vector.

Dependencies

To enable this port, use the Battery (Table-Based) block as the component model block for the Cell child object of this block and enable the SOC port.

Conserving

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Electrical conserving port associated with the positive terminal of the battery pack.

Electrical conserving port associated with the negative terminal of the battery pack.

Thermal conserving port associated with the ambient thermal path.

Dependencies

To enable this port, set the AmbientThermalPath property of the Pack object to "CellBasedThermalResistance".

Thermal conserving port associated with the coolant thermal path.

Dependencies

To enable this port, in the Pack object, set the CoolantThermalPath property to "CellBasedThermalResistance" and the CoolingPlate property to "None".

Since R2023a

Thermal fluid conserving port associated with the fluid that comes in each cooling plate of the model. The size of this port depends on the number of cooling plates in the model.

Dependencies

To enable this port, set the CoolingPlate property of the Pack object to either "Top" or "Bottom".

Since R2023a

Thermal fluid conserving port associated with the fluid that comes out of each cooling plate in the model. The size of this port depends on the number of cooling plates in the model.

Dependencies

To enable this port, set the CoolingPlate property of the Pack object to either "Top" or "Bottom".

Since R2024a

Electrical array-of-nodes conserving port associated with the positive terminals of the parallel assemblies inside this pack. Each element of this array corresponds to a positive terminal of a parallel assembly inside this pack.

Dependencies

To enable this port, set the BalancingStrategy property of the Pack object to "External".

Since R2024a

Electrical array-of-nodes conserving port associated with the negative terminals of the parallel assemblies inside this pack. Each element of this array corresponds to a negative terminal of a parallel assembly inside this pack.

Dependencies

To enable this port, set the BalancingStrategy property of the Pack object to "External".

Version History

Introduced in R2022b

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See Also

Apps

Simscape Blocks

Objects

Functions

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