MATLAB: Coulomb Counting Calculation of the battery SoC

battery soccoulomb counting

How to calculate or estimate the battery SoC by Coulomb Counting?

Best Answer

Coulomb counting is basically the integral of the current w.r.t. time. So if you have current values and corresponding time values, then you can use cumtrapz()

t; % time
I; % current values
Q = cumtrapz(t, I)

Related Solutions

MATLAB: How to integrate data points

Use the cumtrapz function.

For example:

a = acceleration_vector_from_file;
t = time_vector_from_file;
v = cumtrapz(t, a);         % Velocity
c = cumtrapz(t, v);         % Displacement

MATLAB: How do integrate this function over t=0 to t=165

I am not certain what you want to integrate, or what you want the final result to be.

Try this:

mi=2290000;
mf=130000;
tb=165;
t = linspace(0, tb, 150);
mr = mi-((mi-mf)*(t/tb));
mr_int = cumtrapz(t, mr);                           % Integrate ‘mr’
figure
semilogy(t,mr, 'blue')
hold on
plot(t, mr_int, 'g')
g = 9.81;
Isp=263;
u = g.*(Isp.*log(mi./mr)-t);
u_int = cumtrapz(t, u);                             % Integrate ‘u’
plot(t, u)
plot(t, u_int)
hold off
legend('mr', 'mr\_int', 'u', 'u\_int', 'Location','SE')

I ploltted the vectors in semilogy so they would all be visible.

Experiment to get different results.

Best Answer

Related Solutions

MATLAB: How to integrate data points

MATLAB: How do integrate this function over t=0 to t=165

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