Abstract
The state of charge (SOC) is an essential indicator needed for
a proper and safe operation of a battery. A large majority of
methods used to estimate SOC rely on the open circuit voltage
(OCV) curve. The OCV-SOC relationship is characteristic of the
battery chemistry but it may also be affected by the temperature,
aging or even the measurement procedure. In this work, the
effect of these factors on the OCV curve is analyzed and their
influence on the SOC estimation is studied. For this purpose
an extended Kalman filter (EKF) has been used to compare the
SOC estimation performance under different conditions. Also, the
results obtained by two different methods have been compared,
at two different aging states and various temperatures in the
range 5-40C.
a proper and safe operation of a battery. A large majority of
methods used to estimate SOC rely on the open circuit voltage
(OCV) curve. The OCV-SOC relationship is characteristic of the
battery chemistry but it may also be affected by the temperature,
aging or even the measurement procedure. In this work, the
effect of these factors on the OCV curve is analyzed and their
influence on the SOC estimation is studied. For this purpose
an extended Kalman filter (EKF) has been used to compare the
SOC estimation performance under different conditions. Also, the
results obtained by two different methods have been compared,
at two different aging states and various temperatures in the
range 5-40C.
| Original language | English |
|---|---|
| Title of host publication | IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society |
| Number of pages | 6 |
| Publisher | IEEE |
| Publication date | 18 Nov 2020 |
| Pages | 1767-1772 |
| ISBN (Electronic) | 978-1-7281-5414-5 |
| DOIs | |
| Publication status | Published - 18 Nov 2020 |
| Event | 46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020 - Virtual, Singapore, Singapore Duration: 18 Oct 2020 → 21 Oct 2020 http://www.conferences.academicjournals.org/cat/physical-sciences/46th-annual-conference-of-the-ieee-industrial-electronics-society |
Conference
| Conference | 46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020 |
|---|---|
| Country/Territory | Singapore |
| City | Virtual, Singapore |
| Period | 18/10/2020 → 21/10/2020 |
| Sponsor | IEEE Industrial Electronics Society (IES), SPECS - Smart Grid + Power Electronics Consortium Singapore, The Institute of Electrical and Electronics Engineers (IEEE) |
| Internet address |
| Series | Proceedings of the Annual Conference of the IEEE Industrial Electronics Society |
|---|---|
| ISSN | 1553-572X |
Keywords
- lithium-ion (Li-ion) battery
- Open Circuit Voltage
- Temperature
- Kalman Filter
- State of charge (SOC)
- Aging