Passive Cell Balancing

This operates by discharging cells with high SoC through a resistor and thus equalling out the SoC on the cells as a whole.

This is the cheapest and also the most common balancing system in use in hybrid and electric vehicle battery packs. The downside is energy is dissipated as heat as the system operates by discharging the cells with the highest SoC and bringing them in line with the cells that have the lowest SoC.

See also: Active Cell Balancing, Battery Cell Balancing.

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Subjects: Electrochemistry