source:Geerady       date: 2022-06-17
It is generally considered that the recession of the performance of the fuel cell is due to the phenomenon of the sintering of platinum catalyst particles, the corrosion of the carbon carrier, and the velocity cathode of the decline is higher than the anode. Several important issues that improve battery life should be considered:
(1) The battery voltage cannot exceed 0. 8V. This means that the battery cannot be in an open state at 180 ¡ã C or even higher temperatures. The appropriate method should be used to reduce the battery voltage during the stop, and the general use of precautions is to blow nitrogen to the reaction gas. Short-circuit is also a feasible method of reducing the voltage. Similar measures are also required to extend battery life.
(2) Avoiding instantaneous changes in operation, including fast opening. Quickly stop the perturbation of the reaction gas stream. The pressure difference between the electrodes is poor, and the distribution of the three-phase district is also affected, so that the electrode or the lack of acid is lacking. Therefore, there must be a specialized control system to prevent such phenomena from happening.
(3) It is necessary to ensure sufficient reaction gas to the battery. Otherwise, the output voltage will occur, and the battery life is shortened. Even a transient, you must also supply sufficient gases to the battery. Since at least a few seconds from the heavyweight to the battery (a few minutes required for large systems), it is difficult to provide adequate reactive gases immediately when there is emergency power demand, so reasonable design must be performed
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