Multi-module, scalable, high power density, radiation-hardened power converter interface system

摘要

The novel cell balancing approach being disclosed minimizes the number of controlled active devices to enable Li-ion cell balancing in a battery arrangement. This is accomplished through a network of passive components associated with each cell. The network of passive components forms a bandpass filter. This allows selective charging of a cell purely based on the frequency components of a variable switching frequency controller.

主权项

1. A selective cell charger apparatus for a battery stack comprising a plurality of individual cells stacked in series, the apparatus comprising:
a plurality of unique frequency impedance networks with each unique frequency impedance network individually attached to one cell of the individual cells, the unique frequency impedance network defining a unique band pass filter frequency that is unique to one cell of the individual cells; and a frequency shifting block generating a frequency charge signal including at least one charging frequency matching the band pass filter frequency that is unique to the one cell.