Research on Low-Temperature Energy Management Strategies for Fuel Cell Hybrid Systems

Fuel cell vehicles (FCV) are widely recognized for their environmental benefits, high efficiency, and short refueling times, garnering significant attention both domestically and internationally. However, the challenges of low-temperature startup and the substantial decline in the performance of power batteries under cold conditions severely hinder the widespread adoption of FCVs. This study investigates low-temperature technologies for fuel cells and power batteries, designs a low-temperature thermal management system for a fuel cell hybrid powertrain, and develops low-temperature startup techniques along with a multimode coordinated control strategy for rapid cold-start. These solutions were validated through vehicle testing, demonstrating that the designed thermal management system and the multimode coordinated control strategy effectively enhance the overall efficiency and cold-start capability of fuel cell vehicles.