C​ell Balancing

Balance a battery with two cells connected in series by using a passive cell balancing algorithm. The initial state-of-charge (SOC) for the two cells are equal to 0.7 and 0.75. The balancing procedure depends on the cell voltages. Alternatively, you can use the SOC values for balancing. When the balancing is active, a bleeding resistor switches on to bleed the cells with higher charge. You can use the objects and functions in the Battery Pack Model Builder to generate more complex battery packs.

Implement a passive cell balancing for a lithium-ion battery pack. Cell-to-cell differences in the battery module create imbalances in the cell state-of-charge (SOC) and voltages. In this example, the balancing algorithm triggers when the battery pack is idle and the difference in the cell SOC is greater than a certain predefined value. The passive balancing shunt resistor is sized based on power loss and balancing time considerations.

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