An Electrochemical Based Rapid Method and Its Application to the State Estimation of Battery Pack of Electric Vehicle

In this thesis, we refer to the concept of single particle model and use the simplified mathematical solutions with the original electrochemical governing equations. Next, using MATLAB software, we successfully develop a program named ”〖HAIDS〗^(×4)”based on electrochemical method. This paper is the first use of electrochemical method with common software and hardware equipment, to simulate the state of large-scale battery pack system. For a single battery charge and discharge, the operation time is less than 0.03 seconds. It’s a thousand times faster than full order model. In addition, simulation of a large-scale battery group, the calculation time is controlled in 45 seconds with the actual one hour of working behavior. As an extension, try to apply this electrochemical calculation program to analyze the state of battery pack of pure electric vehicle in general road driving conditions. This thesis presents the calculation results by electrochemistry to understand the working situation of the battery pack. Furthermore, we can estimate the remaining useful life of battery pack of pure electric vehicle after traveling 50 thousand kilometers with about 25-hour simulation time. It will provide consumers and manufacturers a simple cost value, allowing them to make more appropriate decisions.