Iterate over charges

explore_data.py

+import scipy.io
+import os
+from glob import glob
+
+
+def convert_matlab_datetime_vector_to_utc(date_vector):
+    string_time = \
+        str(int(date_vector[0])) + "-" + \
+        str(int(date_vector[1])) + "-" + \
+        str(int(date_vector[2])) + "T" + \
+        str(int(date_vector[3])) + ":" + \
+        str(int(date_vector[4])) + ":" + \
+        str(float(date_vector[5]))
+
+    return string_time
+
+
+def filter_mat(mat, test_type):
+    return [x for x in mat if x[0][0] == test_type]
+
+
+def charge_iteration(charge_items):
+    for item in charge_items:
+        test_type = item[0][0]  # charge impedence discharge
+        ambiant_temp = item[1][0][0] # temperature: 4 ~24 ~43
+        datetime = convert_matlab_datetime_vector_to_utc(item[2][0])
+
+        voltage_measured = item[3][0][0][0][0] # Battery terminal voltage (Volts)
+        current_measured = item[3][0][0][1][0] # Battery output current (Amps)
+        temperature_measured = item[3][0][0][2][0] # Battery temperature (degree C)
+        current_charge = item[3][0][0][3] # Current measured at charger (Amps)
+        voltage_charge = item[3][0][0][4] # Voltage measured at charger (Volts)
+        # MEH
+        time = item[3][0][0][5] # Time vector for the cycle (secs)
+
+        #check size for plotting
+        if (len(voltage_measured) != len(current_measured) and
+            len(voltage_measured) != len(temperature_measured) and
+            len(voltage_measured) != len(voltage_measured) and
+            len(voltage_measured) != len(current_charge)
+        ):
+            import sys
+            sys.exit("ERROR")
+
+
+def main():
+    filepaths = [y for x in os.walk("./data/") for y in glob(os.path.join(x[0], '*.mat'))]
+
+    for filepath in filepaths:
+        filename = filepath.split("/")[-1].split(".")[0]
+        print(filename)
+        raw_mat = scipy.io.loadmat(filepath)
+        mat = raw_mat[filename][0][0][0][0]
+
+        impedance_items = filter_mat(mat, "impedance")
+        charge_items = filter_mat(mat, "charge")
+        discharge_items = filter_mat(mat, "discharge")
+
+        charge_iteration(charge_items)
+
+        # print(([1][0]))
+        # print(mat["B0025"][0][0])
+
+        # TODO
+        # for discharge the fields are:
+        #  Voltage_measured: 	Battery terminal voltage (Volts)
+        #  Current_measured:	Battery output current (Amps)
+        #  Temperature_measured: 	Battery temperature (degree C)
+        #  Current_charge:		Current measured at load (Amps)
+        #  Voltage_charge:		Voltage measured at load (Volts)
+        #  Time:			Time vector for the cycle (secs)
+        #  Capacity:		Battery capacity (Ahr) for discharge till 2.7V 
+        # for impedance the fields are:
+        #  Sense_current:		Current in sense branch (Amps)
+        #  Battery_current:	Current in battery branch (Amps)
+        #  Current_ratio:		Ratio of the above currents 
+        #  Battery_impedance:	Battery impedance (Ohms) computed from raw data
+        #  Rectified_impedance:	Calibrated and smoothed battery impedance (Ohms) 
+        #  Re:			Estimated electrolyte resistance (Ohms)
+        #  Rct:			Estimated charge transfer resistance (Ohms)
+
+if __name__ == "__main__":
+    main()