This paper proposes a universal rapid modeling method suitable for H-bridge cascaded topologies. The method innovatively employs controlled-source decoupling technology, utilizing voltage/current-controlled sources to achieve dynamic decoupling between the DC side and H-bridge circuits. While maintaining system equivalence, it effectively separates the modeling of the DC side and H-bridge arms. This decoupling mechanism enables flexible compatibility of the DC side with various energy units (such as SVG capacitor systems, battery energy storage systems, photovoltaic arrays, etc.), significantly enhancing topological adaptability. Simulation models of Cascaded H-Bridge Battery systems built on MATLAB/Simulink and SimuNPS platforms demonstrate that compared with traditional modeling methods, this technology achieves improved computational speed in multi-module cascaded scenarios, particularly meeting the real-time simulation requirements of large-scale power electronic systems. The research results provide a new technical pathway for rapid prototyping verification of complex H-Bridge topologies with user-defined configurations.