Current Management

Battery charging and discharging management

Develop algorithms for charging and discharging a battery and to set the charging and discharging limits.

Blocks

Battery CC-CV	Constant current constant voltage charging algorithm (Since R2022b)
Battery Charging Current Limit	Maximum battery charging current (Since R2022b)
Battery Discharging Current Limit	Maximum battery discharging current (Since R2022b)

Featured Examples

Balance Battery Cells with Switched Capacitor Method

Balance a battery with two cells connected in series by using the switched-capacitor (SC) strategy for active cell balancing. For shuttling the energy between the battery cells, this method uses capacitors as external energy storage elements. To balance N cells, the SC method requires N-1 capacitors and 2*N bidirectional switches. The control strategy has two states only and can work in charging and discharging modes. The initial state of charge (SOC) is 0.7 for one cell and 0.75 for the other. To generate more detailed battery packs, use the objects and functions in the Battery Pack Model Builder.

Since R2023b
Open Model

Battery Charging and Discharging

Use a constant current and constant voltage algorithm to charge and discharge a battery. The Battery CC-CV block is charging and discharging the battery for 10 hours. The initial state of charge (SOC) is equal to 0.3. When the battery is charging, the current is constant until the battery reaches the maximum voltage and the current decreases to 0. When the battery is discharging, the model uses a constant current.

Open Model

Charge Battery Module with Charger Block

Charge a battery module using a constant-current step followed by a constant-voltage step. This is a CC-CV profile. The battery simulation utilizes a Simscape™ Battery™ Charger block. At the start of the simulation, the battery module has a state of charge (SOC) of 10%. The Charger block performs a constant-current (CC) charging until it reaches the predefined module voltage limit of 4.1 V. The block then switches to a constant-voltage (CV) control step where the current gradually decreases until it reaches a threshold of 0.5 A, specified in the Current Threshold parameter. The charging procedure stops once the current reaches the designated threshold.

Since R2024a
Open Live Script

Charge and Discharge Battery Module with Passive Balancing

Perform a cyclic charge and discharge cycle on a battery module while balancing the voltages of the module parallel assemblies.

Since R2024a
Open Live Script

Charge and Discharge Module Assembly with Coolant Control

Perform a charging and discharging cycle on a battery module assembly while monitoring the cell temperature and enabling cooling.

Since R2024a
Open Live Script

Charge and Discharge Battery Module with State of Charge Estimator

Cyclically charge and discharge a battery module while estimating the state of charge (SOC) of the three parallel assemblies of the module over time. This example uses the SOC estimation to switch between the charging and discharging profiles. For the estimation, the Kalman filter uses an initial SOC estimation and the voltage, current, and temperature of the parallel assemblies. The model estimates the temperature of the parallel assemblies from the average of the cell temperatures of each parallel assembly.

Since R2024a
Open Live Script

Perform Controlled Charging and Discharging on Battery Module

Perform a cyclic charge and discharge profile on a battery module by using the Battery CC-CV block. At the start of the simulation, the battery module has a state of charge (SOC) of 10%. The Battery CC-CV block performs a constant-current (CC) charging until it reaches the limit cell voltage of 4.1 V specified in the Maximum cell voltage (V) parameter. The block then charges the battery with a constant-voltage (CV) profile until the module SOC reaches 90%. Finally, the block starts a CC discharging procedure and discharges the module until the SOC reaches the initial value of 10%. The charge and discharge cycle then restarts.

Since R2024a
Open Live Script

Current Management​