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Why do we need to model batteries?

Hi,

I am new to batteries and I fail to understand a basic thing -  Why do we need to model batteries from application point of view?

I understand there are a number of different techniques to model - based on electrochemical process, mathematical equations and equivalent circuits.

What I do not understand is how do we use the model in the real world application? 

Lets say we want to measure the SoC of a battery - we can use OCV and Coulomb Counting methods. 

How does a model help in finding SoC or in monitoring the battery?

The only use of a model I can find is to use for simulation purposes. Does it have any other requirement?

It would be great if someone can help me better understand the benefits of modelling.

 

  • Hi Rushi,

    Modeling is important for estimating where the battery is at in terms of SOC and calculating the SOH of the battery. In general coulomb counting and using an OCV curve are definitely used to help as a starting point, but with an applications varying in loading and the overall lifetime of charging cycles cause the battery to age in a vareity of ways. Therefore, modeling a cell gives us corner cases and multiple parameters of the cell to start the gauging properly and the algorithm will, over time, adapt itself as well.

    Thanks

    Miguel