US 12,463,545 B2
Isolated bi-directional DC conversion circuit and method for controlling the same
Cheng Wan, Shanghai (CN); Lewei Qian, Shanghai (CN); Fei Chen, Shanghai (CN); Haibo Qiao, Shanghai (CN); Jianlei Yi, Shanghai (CN); and Pengtao Zhao, Shanghai (CN)
Assigned to APTIV ELECTRIC SYSTEMS COMPANY LTD., Shanghai (CN)
Filed by APTIV ELECTRIC SYSTEMS COMPANY LTD., Shanghai (CN)
Filed on Dec. 21, 2023, as Appl. No. 18/391,940.
Claims priority of application No. 202211650796.6 (CN), filed on Dec. 21, 2022.
Prior Publication US 2024/0213884 A1, Jun. 27, 2024
Int. Cl. H02M 3/335 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/33584 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0058 (2021.05); H02M 3/33592 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An isolated bi-directional DC conversion circuit, comprising:
a transformer with at least one first energy storage element;
a primary-side rectification bridge coupled to a primary side of the transformer and with at least one second energy storage element;
a secondary-side rectification bridge coupled to a secondary side of the transformer, wherein the primary-side rectification bridge consists of multiple first power switching devices, wherein the secondary-side rectification bridge consists of multiple second power switching devices, and wherein each of the multiple first power switching devices and the second power switching devices having a body diode in inverse parallel connection therewith;
multiple first sampling resistors respectively provided on each bridge arm of an upper bridge arm or a lower bridge arm of the secondary-side rectification bridge; and
a controller configured to, in a first mode for power conversion from the primary side to the secondary side, perform switch control on the multiple second power switching devices based on a sampled voltage of the multiple first sampling resistors.