Method for starting up fuel cell

The invention relates to a method for starting up a fuel cell (3) in a fuel cell system (1) at temperatures below the freezing point of water. The method according to the invention is characterized inthat in a first step (I), the hydrogen concentration (%H2) in the anode (4) is increased; in a second step (II), the anode pressure (p) is then increased for a specified duration ([delta]t), and whenair is supplied to the cathode (5), the maximum possible current is drawn from the fuel cell (3); in a third step (III), the fuel cell (3) is then switched without a load and the anode pressure (p) is reduced; and the second step (II) and the third step (III) are then repeated one after the other until a performance of the fuel cell (3) is reached which is sufficient for a normal operation. 本发明涉及一种用于在低于水结冰点的温度下启动燃料电池系统(1)中的燃料电池(3)的方法。本发明方法的特征是，在第一步骤(I)中提高阳极(4)中的氢浓度(％H)；随后在第二步骤(II)中在规定的时间段(Δt)提高阳极压力(p)，并且在空气被供应给阴极(5)时从燃料电池(3)汲取尽可能大的电流；随后在第三步骤(III)中将燃料电池(3)切换成无负荷并且降低阳极压力(p)；且随后一直接连重复第二步骤(II)和第三步骤(III)，直至燃料电池(3)达到足以供其正常运