Dual active bridge energy storage module systems

1. An energy storage module (ESM) assembly, comprising:

an ESM having an energy source;

a multi-level dual active bridge (ML-DAB) connected to the energy source to source current therefrom, or send current thereto, or both, wherein the ML-DAB includes:

a bi-directional DC/AC converter, wherein the DC/AC converter includes a conductor connected to the energy source;

a bi-directional isolation transformer connected to the bi-directional DC/AC converter; and

a second bi-directional DC/AC converter connected to the isolation transformer, wherein the second bi-directional DC/AC converter is a t-type dual active bridge, and wherein the second bi-directional DC/AC converter includes a negative converter conductor, a neutral conductor, and a positive converter conductor; and

a power filter connected to the negative converter conductor, the neutral conductor, and the positive converter conductor of the ML-DAB, wherein the power filter includes a negative lead, a positive lead and neutral filter lead extending therefrom configured and adapted to be electrically coupled to a negative rail, a positive rail and a neutral rail, respectively, of a DC bus.

2. The ESM assembly as recited in claim 1 , wherein the energy source includes at least one of a fuel cell, battery, or ultracapacitor.

3. A system architecture, comprising:

an ESM assembly as recited in claim 1 ; and

a DC bus connected to the ESM assembly.

4. The system architecture as recited in claim 3 , wherein the power filter is coupled between the ML-DAB and the DC bus.

5. The system architecture as recited in claim 4 , wherein the negative lead, the positive lead and the neutral filter lead extending from the power filter are electrically coupled to a negative rail, a positive rail and a neutral rail, respectively, of the DC bus.

6. The system architecture as recited in claim 3 , wherein the ESM includes at least one of a fuel cell, battery, or ultracapacitor.

7. The system architecture as recited in claim 3 , wherein the ESM assembly is a first ESM assembly, the system further comprising a second ESM assembly in parallel with the first ESM assembly.

8. The system architecture as recited in claim 7 , wherein the second ESM assembly is electrically coupled to a negative rail, a positive rail and a neutral rail of the DC bus.

9. The ESM assembly as recited in claim 1 , wherein the second bi-directional DC/AC converter includes three legs, wherein a first of the three legs connects between the bi-directional isolation transformer and the positive converter conductor and includes first and second solid-state switch devices connected in series, and wherein a second of the three legs connects between the isolation transformer and the negative converter conductor and includes first and second solid-state switch devices connected in series.

10. The ESM assembly as recited in claim 9 , wherein a third of the three legs connects between the isolation transformer and the neutral conductor and includes only first and second solid-state switch devices connected in series.

11. The system architecture as recited in claim 3 , wherein the second bi-directional DC/AC converter includes three legs, wherein a first of the three legs connects between the bi-directional isolation transformer and the positive converter conductor and includes first and second solid-state switch devices connected in series, wherein a second of the three legs connects between the isolation transformer and the negative converter conductor and includes first and second solid-state switch devices connected in series, wherein a third of the three legs connects between the isolation transformer and the neutral conductor and includes first and second solid-state switch devices connected in series.

12. The system architecture as recited in claim 11 , wherein a third of the three legs connects between the isolation transformer and the neutral conductor and includes only first and second solid-state switch devices connected in series.