How to set t_eval ?

[Mrzhang-hub]

I wanna ask how to set t_eval when only one current value from driving cycle is taken as input each time. It seems it is only a specific time point instead of an time interval. Is it reasonable that I randomly set a very small value for t_eval such as 0.01s? But when I do this , the output value of SEI thickness will fluctuate instead of increasing as battery ages

[rtimms]

You can just do e.g.

t_eval = np.linpace(0, 100, 100)
sim.solve(t_eval)

If you are using a drive cycle and you don't pass t_eval it will just used the times in the csv file, but you can pass your own t_eval (you might get a warning if your t_eval doesn't contain all the times in the data or if it is at a lower sample rate).

[rtimms]

Also, what is the scale on that plot? I can't quite make it out, but it looks like the fluctuations are on the order of 10^-17 around a base value of 5e-9, so I think this is just numerical.