To increase the utilization of Low-Speed Electric Vehicles (LS-EVs), rapid recharging of the EV’s battery pack turn out to be essential. This permits reduced charging times, greater vehicle utility, and broader adoption of LS-EVs. This paper presents a modular Input-Series Output-Parallel (ISOP) DC-DC converter for LS-EVs fast chargers. A generalized small-signal analysis applicable for any multimodule connection (Input-Series Input-Parallel Output-Series Output-Parallel (ISIP-OSOP) is introduced. The employed topology is a multimodule DC-DC converter based on Dual Active Bridge (DAB). Nonetheless, a single bridge is utilized at the primary side, and the modularity concept is applied to the high-frequency transformer and the second bridge where the connection of the modules is ISOP. In the presented system, 3-modules are employed where each module is rated at $1.5\mathrm{k}\mathrm{W}$to achieve the desired power rating, which is $4.5\mathrm{k}\mathrm{W}$. The charging process is achieved from a single-phase outlet. However, due to the high output current, a modular approach is required to avoid high losses. Uniform power-sharing is achieved through a direct output current sharing control, ensuring stability without the need for input voltage sharing loops, unlike the conventional ISOP converters. This is due to the fact that the proposed configuration uses only a single capacitor at the input side, avoiding the inherent instability problem caused by the output current sharing control. The controller is examined using a 3-module ISOP DC-DC converter, where the controlled current is following the reflex charging algorithm. Simulation results using the Matlab/Simulink platform are provided to elucidate the presented concept considering parameter mismatches, where the input voltage and the output current are equally shared among the three modules.

为了提高低速电动汽车（LS-EV）的利用率，电动汽车电池组的快速充电显得至关重要。这样可以减少充电时间，提高车辆利用率，并广泛采用LS-EV。本文提出了一种用于LS-EV快速充电器的模块化输入串联输出并联（ISOP）DC-DC转换器。介绍了适用于任何多模块连接的通用小信号分析（输入系列输入并联输出系列输出并联输出（ISIP-OSOP）），采用的拓扑是基于双有源桥（DAB）的多模块DC-DC转换器。然而，在主侧使用单个桥，并且模块化概念被应用到高频变压器和第二桥，其中模块的连接为ISOP。$1.5\mathrm{ķ}\mathrm{w\; ^}$达到所需的额定功率，即 $4.5\mathrm{ķ}\mathrm{w\; ^}$。充电过程是从单相插座实现的。但是，由于高输出电流，需要采用模块化方法来避免高损耗。与传统的ISOP转换器不同，通过直接的输出电流共享控制实现了均匀的功率共享，无需输入电压共享环路即可确保稳定性。这是由于以下事实：建议的配置在输入侧仅使用单个电容器，从而避免了由输出电流共享控制引起的固有不稳定性问题。使用3模块ISOP DC-DC转换器检查控制器，其中受控电流遵循反射充电算法。提供了使用Matlab / Simulink平台的仿真结果，以阐明考虑参数不匹配的提出的概念，