燃料电池混合动力系统镍氢电池特性

Characteristics of a nickel metal hydride battery in a hybrid fuel cell system

结合Rint模型分析某80Ah镍氢动力电池单体特性，以确定其在燃料电池混合动力系统中的最佳工作范围，并加以实验验证。结果显示，在燃料电池混合动力系统中镍氢电池SOC应保持在40％～60％之间，充放电电流应处于-160～240A的范围，温度应维持在常温附近，以确保系统安全性和经济性。台架实验显示，通过稳态分配结合动态滤波的算法模式和恰当的参数匹配，整车控制器可以使镍氢电池工作在目标区域，从而使混合动力系统满足城市公交工况的动力性和经济性需求，并限制燃料电池发动机的输出功率波动。

The Rint model was used to analyze the battery characteristics of an 80 Ah nickel metal hydride battery to determine its optimal working size in a hybrid fuel cell system. The results show that the hybrid fuel cell system safety and economy are guaranteed with battery state of charge （SOC） values of 40° to 60°, currents of - 160 to 240 A, and temperatures near ambient temperature. The system uses energy management control with a ＂stable distribution plus dynamic filtering＂ mode to keep the battery working at the optimal conditions. The hybrid fuel cell system is effective for city traffic conditions with very efficient power usage, acceptable fuel economy, and mild fuel cell power fluctuations.