US 12,083,913 B2
Systems, apparatus and methods for electric vehicle charging via a power conversion system
Josh Keister, Atlanta, GA (US); Lyle T. Keister, Athens, GA (US); and Mehdi Abolhassani, Houston, TX (US)
Assigned to Resilient Power Systems, Inc., Statham, GA (US)
Filed by Resilient Power Systems, Inc., Athens, GA (US)
Filed on Feb. 23, 2022, as Appl. No. 17/678,323.
Application 17/678,323 is a continuation of application No. 17/244,993, filed on Apr. 30, 2021.
Prior Publication US 2022/0348096 A1, Nov. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B60L 53/30 (2019.01); B60L 55/00 (2019.01); H02J 3/38 (2006.01); H02J 7/35 (2006.01); H02M 3/335 (2006.01)
CPC B60L 53/30 (2019.02) [B60L 55/00 (2019.02); H02J 3/381 (2013.01); H02J 7/35 (2013.01); H02M 3/33573 (2021.05); H02M 3/33584 (2013.01); B60L 2210/10 (2013.01); B60L 2210/30 (2013.01); B60L 2210/40 (2013.01); H02J 2207/20 (2020.01); H02J 2300/24 (2020.01); H02J 2310/48 (2020.01)] 20 Claims
OG exemplary drawing
 
1. An electric vehicle (EV) charging system comprising:
a plurality of first converters to receive grid power at a distribution grid voltage and convert the distribution grid voltage to at least one second voltage;
at least one high frequency transformer coupled to the plurality of first converters to receive the at least one second voltage and to output at least one high frequency AC voltage; and
a plurality of second converters coupled to an output of the at least one high frequency transformer, each of the plurality of second converters comprising a unidirectional AC-DC converter to receive the at least one high frequency AC voltage and convert the at least one high frequency AC voltage to a DC voltage, wherein at least some of the plurality of second converters are cascaded to provide a DC charging voltage as a charging current or a charging voltage at a pair of output nodes.