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rdbraatz / data-driven-prediction-of-battery-cycle-life-before-capacity-degradation

Code for Nature energy manuscript
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question about the data column 'Qc' #11

Closed Txiaoxiao closed 5 years ago

Txiaoxiao commented 5 years ago

hey, I'm using your data for study, and i'm in doubt about the column 'Qc' in cycles. why the length of 'Qc' of each cycle is equal to other columns like 't' and 'Qd'. didn't you measure Qc when charging and Qd when discharging? I am looking forward to your reply, thanks.

petermattia commented 5 years ago

Hi Txiaixiao, Qc doesn’t change during discharging, and Qd doesn’t change during charging. Plotting both quantities vs time should make this clear (initially Qc will increase and Qd will be 0, and then Qd will increase and Qc will be constant). This structure mirrors how the Arbin cycler treats these capacities as separate. Hope this helps.

Txiaoxiao commented 5 years ago

Thanks for your detailed answer, now I can understand it very clearly, it's a big help for me, thanks very much!

petermattia commented 5 years ago

The additional feature generation and model building code is protected under an academic license. Please contact Richard Braatz at braatz@mit.edumailto:braatz@mit.edu for access to the academic license.

On Sep 18, 2019, at 12:28 AM, Wen Zhang notifications@github.com<mailto:notifications@github.com> wrote:

Hello, petermattia, it's hard to recurrent the features used in this paper, for some notations like $q$ or $\Delta Q(V)$ were defined ambiguously in Supplementary Note 1. Feature formulations, I am wondering whether the source programm about feature extraction can be provided?

ghost commented 5 years ago

@petermattia Thanks, that has been done!