Dynamic load cycling aging test

The cell has passed the dynamic load cycling aging test when the acceptance criterion is met, for example, the cell degradation (rate) is below a specified value for the applied operating conditions [12]. 

Figure 21.5 Example of a load cycling aging test profile (power versus test duration) illustrating the relative power during dynamic cycling phase for lOmin (a) and an initial 1 h polarization curve measurement followed by 2 h dynamic cycling phase and another polarization curve measurement (b). Courtesy of FCTES. ...

Figure 71. Effect of the total precious metal loading at a fixed Pt Rh ratio of 5 1 g/g on the conversion of CO, HC and NO reached over the catalyst at a stoichiometric exhaust gas composition, as a function of the duration of the engine aging (catalyst as Fig. 70 engine bench activity test at a space velocity of 60000 Ml l" h" exhaust gas temperature 723 K exhaust gas composition lambda 0.995 dynamic frequency 1 Hz amplitude 0.5 A/F engine bench aging cycle for various lengths of time). Reprinted with permission from ref. [76], 1990 Society of Automotive Engineers, Inc.

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