【摘要】 燃料电池是解决碳中和为数不多的解决方案,特别在交通运输领域。然而耐久性依旧是当前阻碍燃料电池全面商业化的瓶颈之一。氢气串漏量是影响燃料电池耐久性重要因素之一,同时也是衡量燃料电池耐久状态的关键指标。但是,漏氢电流的测量由于环境不满足、测试时长、电流冲击等原因局限,一直以来无法用于车载在线测量。本文通过研究线性电压扫描和恒电位扫描方法,首次提出了将二者结合,并配合停机耗氢策略,为成功实现燃料电池堆的在线多节检测奠定了测试方法基础。更多还原

【Abstract】 Fuel cells are one of the few carbon neutrality solutions, especially in the field of transportation. However, durability is still one of the bottlenecks that hinder the full commercialization of fuel cells. Hydrogen crossover is one of the important factors affecting the durability of fuel cells, and it is also a key index to measure the durability of fuel cells. However, the measurement of hydrogen crossover current is unable to be used for on-board stacks due to the limitation of strict condition, testing time, current impact on electric equipment and other reasons. M-LSV is tried for the first time in this paper by combing LSV and chronoamperometric method to resolve the hydrogen crossover current problem for on-board multi-cell stack in a short time. It could be implemented with hydrogen always-on controlling strategy to supply nitrogen environment on cathode side.更多还原