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    • 4. 发明申请
    • Method of operating a fuel cell system under freezing conditions
    • 在冷冻条件下操作燃料电池系统的方法
    • US20050053807A1
    • 2005-03-10
    • US10656529
    • 2003-09-05
    • Richard BreaultPatrick Hagans
    • Richard BreaultPatrick Hagans
    • H01M8/04H01M8/24
    • H01M8/04302H01M8/0258H01M8/04029H01M8/04156H01M8/04223H01M8/04303H01M8/241
    • A fuel cell system having a stack of proton exchange membrane fuel cells is operated in sub-freezing temperatures by draining any liquid water from the fuel cell water flow passages upon or after the previous shut-down of the stack before freezing can occur, and, thereafter a) starting-up the stack by directing fuel and oxidant reactants into the cell and connecting a load to the stack; b) using heat produced by the stack to increase the operating temperature of the stack to melt ice within the stack; and, c) upon the stack operating temperature reaching at least 0° C., circulating anti-freeze through stack coolers to maintain the temperature of the stack low enough to maintain a sufficiently low water vapor pressure within the cells to prevent cell dry out for at least as long as there is insufficient liquid water to circulate through the water flow passages.
    • 具有质子交换膜燃料电池堆的燃料电池系统在次冷冻温度下通过在先前停止堆叠之前或之后从燃料电池水流通道排出任何液态水而在冷冻之前进行操作, 此后a)通过将燃料和氧化剂反应物引入电池并将负载连接到电池堆来启动电池堆; b)使用堆叠产生的热量来增加堆叠的工作温度以融化堆内的冰; 并且c)当堆叠工作温度达到至少0℃时,循环通过叠层冷却器进行冷冻,以将堆的温度保持在足够低的温度,以保持电池内的足够低的水蒸汽压力,以防止电池干燥 至少只要液体水不足以通过水流通道循环。