End of Charge Detection by Processing Impedance Spectra of Batteries

Autor: Ole Gebert, Andre Loechte, Peter Gloesekoetter
Rok vydání: 2020
Předmět:
Zdroj: Contributions to Statistics ISBN: 9783030562182
DOI: 10.1007/978-3-030-56219-9_11
Popis: During the development of new battery technologies, high production tolerances are likely to occur due to the number of manual manufacturing steps. When putting these prototypes into operation, one of the most critical parameters is the reliable state of charge detection. This can be challenging when parameters like the capacity or the end of charge voltage are not precisely known due to the above-mentioned tolerances. In the majority of cases overcharging should be avoided as it harms the battery. This paper proposes a new criterion for detecting the end of the charging process that is based on the rate of change of electrochemical impedance spectra of the examined batteries. Device parameter fluctuations influence every measurement. Therefore, using the rate of change offers the advantage of using relative values instead of absolute values.
Databáze: OpenAIRE