US 12,434,572 B2
Comprehensive control method and system for direct current (DC) power grid of pure battery of ship
Bin Hu, Shanghai (CN); Zhilin Zeng, Shanghai (CN); Shaoyuan Wang, Shanghai (CN); Zhongling Liu, Shanghai (CN); and Jian Li, Shanghai (CN)
Assigned to Shanghai Marine Equipment Research Institute, Shanghai (CN)
Filed by Shanghai Marine Equipment Research Institute, Shanghai (CN)
Filed on Mar. 28, 2025, as Appl. No. 19/093,363.
Application 19/093,363 is a continuation of application No. PCT/CN2024/110967, filed on Aug. 9, 2024.
Claims priority of application No. 202311368957.7 (CN), filed on Oct. 20, 2023.
Prior Publication US 2025/0222789 A1, Jul. 10, 2025
Int. Cl. H02P 1/00 (2006.01); B60L 50/60 (2019.01); B60L 58/12 (2019.01); B60L 58/21 (2019.01); H02M 3/335 (2006.01)
CPC B60L 50/60 (2019.02) [B60L 58/12 (2019.02); B60L 58/21 (2019.02); H02M 3/33573 (2021.05); H02M 3/33584 (2013.01); H02M 3/33592 (2013.01); B60L 2200/32 (2013.01); B60L 2210/10 (2013.01); B60L 2210/42 (2013.01); B60L 2240/24 (2013.01); B60L 2240/42 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A comprehensive control system for a direct current (DC) power grid of a pure battery of a ship, comprising 1# to 4# four identical modular battery packs, two identical propulsion systems, two domestic inverters for supplying power to a domestic load, one equilibrium converter, and one comprehensive control system, wherein the 1# to 4# modular battery packs are identical, the 1# to 4# modular battery packs are respectively connected to a first busbar to a fourth busbar, and an isolation switch and a fast-acting fuse are disposed between the modular battery pack and the corresponding busbar, 1# to 4# propulsion inverters in the two identical propulsion systems are respectively connected to the first busbar to the fourth busbar, and the second busbar and the third busbar are connected through the equilibrium converter, and the two domestic inverters are respectively connected to the second busbar and the third busbar; each of the two identical propulsion systems comprises two propulsion inverters, two propulsion motors, and one propulsion control system, the propulsion motor is an axle-type permanent magnet synchronous motor, and the two propulsion motors are connected to a propeller after being hung on an axle; and a circuit breaker is disposed between the propulsion inverter and the propulsion motor to isolate the inverter and the propulsion motor when the two identical propulsion systems stop or malfunction; and
the comprehensive control system communicates with a 1# propulsion control system and a 2# propulsion control system through a real-time Ethernet; the comprehensive control system communicates with the 1# to 4# modular battery packs, a 1# domestic inverter, a 2# domestic inverter, and the equilibrium converter through a Profibus; the comprehensive control system controls the 1# propulsion control system to allocate power of the 1# propulsion inverter and power of the 2# propulsion inverter; the comprehensive control system controls the 2# propulsion control system to allocate power of the 3# propulsion inverter and power of the 4# propulsion inverter; the comprehensive control system controls a power output ratio of the 1# and 2# domestic inverters; and the comprehensive control system controls the equilibrium converter to perform energy transfer between the second busbar and the third busbar.