Passive Cell Balancing Using 6 Lithium Ion Cells

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Hello guys, in this zip file you will find the Matlab Simulink model on a passive cell balancing using 6 lithium-ion cells.

To preserve battery performance over a prolonged service life in a large-format battery system, it is normally required to achieve a charge balancing approach to account for differences in cell performance. An efficient cell_balancing system preserves the desired level of battery production throughout the life of the battery with a proper safety margin, without adding unnecessary cost, weight, or complexity.

Balancing is the process of equalizing the level of charge in lithium-ion cells on a cell-by-cell basis. There are two ways to do cell balancing such as active cell balancing and passive cell balancing.

In a passive cell balancing, the voltage across each cell is made equal by wasting the energy through a resistor. Suppose, consider there are two cells having the terminal voltage of cell one 4 volts and the terminal voltage of the second cell 5v. The 1v of the 2nd cell is dropped through the resistor to make the voltages of each cell equal. Or else if the state of charge of cell 01 is 30% and the state of charge of cell 02 is 60%, then 30% of the state of charge in cell 02 is dissipated through a resistor, to make the cell’s state of charge equal.

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Thanks & regards,
CS Electrical And Electronics Team

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