The state of health of Li-Po batteries based on the battery´s parameters and a fuzzy logic system

The battery management system (BMS) is an important component of electric and hybrid-electric vehicles. The purpose of the BMS is to keep the battery operation safe and reliable. Fuzzy logic system (FLS) is one of the methods used to maintain the safety and reliability of the battery by state monitoring and evaluation, charge control, and cell balancing in BMS. Fuzzy logic data analysis were used to estimate state of health (SOH). To get data for FLS, temperature value and absolute value of the current were needed. The FLS does not need an exact mathematical model to make decision about a coefficient´s selection. This methodology was chosen to control the SOH output.