How to use the generic supercapacitor model for series and/or parallel connected supercapacitors?

I want to simulate a supercapacitor bank consisting of many series and/or parallel connected supercapacitors. I want to use the generic supercapacitor model offered by Simscape, but I am not sure what values in the supercapacitor block need to be scaled by the number of series/parallel connections. For example, is it just enough to give parameters for number of series and parallel supercapacitors and the model produces right solutions, or should I for example scale the rated capacitance etc. based on the number of series/parallel connections?

An example: one cell has a capacitance of 3200 F and I want to connect 100 of them in series and 3 of those series connections in parallel. Lets assume that the rated voltage for one cell is 2.5 V and series resistance is 0.18e-3. Should I type in the parameters as:

Rated capacitance = 3200 F

Equivalent DC series resistance = 0.18e-3 Ohm

Rated voltage = 2.5 V

Number of series capacitors = 100

Number of parallel capacitors = 3 (or should this be 3*100 if I want 3 parallel connections, each with 100 series connections?)

Initial voltage = 2.5 V

Operating temperature = 25.

Or should I maybe type the values as (np = number of parallel connections, ns = number of series connections)

Rated capacitance = 3200*(np/ns)

Equivalent DC series resistance = 0.18e-3*(ns/np)

Rated voltage = 2.5*ns

Number of series capacitors = 100

Number of parallel capacitors = 3 (or should this be 3*100 if I want 3 parallel connections, each with 100 series connections?)

Initial voltage = 2.5*ns

Operating temperature = 25.

[Gokul Krishna N]

I have this same doubt, did you get the answer?

Answer 1

[Kothuri]

Hi Kasper Keskinen,

To give values to the parameters of the supercapacitor model block in Simscape it is enough to give parameters for number of series and parallel supercapacitors and you need not scale the rated capacitance based on the number of series/parallel connections.

As per the example you have mentioned i.e., one cell has a capacitance of 3200 F and you want to connect 100 of them in series and 3 of those series connections in parallel. Assuming that the rated voltage for one cell is 2.5 V and series resistance is 0.18e-3.

You can type in the parameters of Supercapacitor as attached in the image as follows:

Rated capacitance = 3200 F

Equivalent DC series resistance = 0.18e-3 Ohm

Rated voltage = 2.5 V

Number of series capacitors = 100

Number of parallel capacitors = 3 (if you want 3 parallel connections, each with 100 series connections)

Initial voltage = 2.5 V

Operating temperature = 25.

The below link provides documentation of the parameters in Supercapacitor model of Simscape.

www.mathworks.com/help/sps/powersys/ref/supercapacitor.html?s_tid=doc_ta#btswg6t

Hope this clarifies your doubt.