SPM model to simulate degradation

[iurkens]

Hi

I want to (qualitatively) simulate the impact of additional discharges due to Vehicle-to-grid. I've used the following model configuration with the Okane2022 parameter set:

Model: SPM
options ={
"SEI":"solvent-diffusion limited",
"SEI film resistance": "distributed",
"SEI porosity change": "true",
"SEI on cracks": "true",

"particle mechanics": ("swelling and cracking", "swelling only"),
"lithium plating": "partially reversible",
"lithium plating porosity change": "true",
"loss of active material" : "stress and reaction-driven"
}

Yet, there is no additional degradation due to higher DoDs, and i think that cannot be true with particle cracking enabled.

My question:
In the paper of (OKane et al. 2022) these submodels were used in combination with the DFN model. Do I need to use the DFN model to successfully simulate the impact of DoD on battery degradation?

With kind regards

[iurkens]

Edit:

1. I've concluded that using the DFN model doesn't help, however, I was only to simulate it on smaller timescales (1 year).
2. I think LAM "stress-driven" would give the same results because there are not enough parameters in the Okane set to simulate the "reaction-driven" part.

If someone could give me some advice, I would be very grateful.

These were the results with a variation of DoDs (34%, 48% and 61%) during 10 years

With kind regards

[DarioSlaifsteinSk]

Hi @iurkens,
I'm having the same issue! I can't find how the SEIgrowth submodel relates to the current.