add paper for model_r

innenwiderstand.py

@@ -1,6 +1,7 @@
 from matplotlib import pyplot as plot
 import numpy as np
 
+
 class Params:
 	def __init__(self, alpha, beta):
 		self.alpha = alpha
@@ -10,6 +11,14 @@ class Params:
 def bas(soc: float):
 	return 0.05, 25
 
+
+# from:
+# "Experimental Analysis and Modeling of
+# Temperature Dependence of Lithium-Ion Battery
+# Direct Current Resistance for Power Capability Prediction",
+# Linfeng Zheng et al., University of Technology Sydney, Australia
+# URL:
+# https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://opus.lib.uts.edu.au/rest/bitstreams/80b07f8a-db41-4cdc-b645-dbe5c0bf2446/retrieve&ved=2ahUKEwi4teeEzv2LAxVVxgIHHZwIF1IQFnoECBkQAQ&usg=AOvVaw30hTrXeAXEETJDmB7-0rze
 def model_r(temperature: float, soc: float, p: Params):
 	rb, tb = bas(soc)
 	tb = 25