Multi-module, scalable, high power density, radiation-hardened power converter interface system
First Claim
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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.
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Abstract
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.
27 Citations
7 Claims
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1. A selective cell charger apparatus for a battery stack comprising a plurality of individual cells stacked in series, the apparatus comprising:
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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. - View Dependent Claims (2, 3)
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4. A selective cell charger apparatus for a battery stack comprising a first cell and a second cell stacked in series, the apparatus comprising:
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a first plurality of unique frequency impedance networks electrically connected to the first cell and defining a first band pass filter frequency; a second plurality of unique frequency impedance networks electrically connected to the second cell and defining a second band pass filter frequency; and a frequency shifting block generating a frequency charge signal selectively including a charge signal selected from the frequency group including a first charging frequency matching the first band pass filter frequency and a second charging frequency matching the second band pass filter frequency. - View Dependent Claims (5, 6, 7)
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Specification