Abstract
This study mainly focused on evaluating the activation energy of LiFePO4 batteries by using a novel dual dynamic stress accelerated degradation test, called D2SADT. This test method was developed to simulate a situation involving driving an electric vehicle in the city. D2SADT contains two controllable dynamic stress variables: the environmental factor corresponding to temperature cycling and the power factor corresponding to charging-discharging currents and times at which they were implemented simultaneously. A reference power test was performed repeatedly at a certain time (e.g., five temperature cycles), and the cell capacity was then calculated to monitor the degradation of the batteries. A physical-based reliability model called Norris-landzberg equation was applied to compute the activation energy which is the indicator to explain the degradation behavior of the Li-ion battery using D2SADT. The test results indicate that the activation energy decreases when the capacity loss (before 10%) increases. It is concluded that the power fade may be accelerated when the charge-discharge cycle increases for the LiFePO4 battery operated a specific power-and-temperature cycling condition. The test is ongoing and the updated results are under analysis to help us understand the degradation mechanism of Li-ion batteries by more realistic test conditions.
| Original language | English |
|---|---|
| Title of host publication | Conference Proceedings - 23rd ISSAT International Conference on Reliability and Quality in Design |
| Editors | Hoang Pham |
| Publisher | International Society of Science and Applied Technologies |
| Pages | 121-125 |
| Number of pages | 5 |
| ISBN (Electronic) | 9780991057641 |
| Publication status | Published - 2017 Jan 1 |
| Event | 23rd ISSAT International Conference on Reliability and Quality in Design 2017 - Chicago, United States Duration: 2017 Aug 3 → 2017 Aug 5 |
Publication series
| Name | Conference Proceedings - 23rd ISSAT International Conference on Reliability and Quality in Design |
|---|
Other
| Other | 23rd ISSAT International Conference on Reliability and Quality in Design 2017 |
|---|---|
| Country | United States |
| City | Chicago |
| Period | 17-08-03 → 17-08-05 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Safety, Risk, Reliability and Quality
Cite this
}
Estimating activation energy of the LiFePO4 battery using dual dynamic stress accelerated degradation tests. / Lin, Yu Chang; Li, Yi Ru; Chung, Kuan-Jung.
Conference Proceedings - 23rd ISSAT International Conference on Reliability and Quality in Design. ed. / Hoang Pham. International Society of Science and Applied Technologies, 2017. p. 121-125 (Conference Proceedings - 23rd ISSAT International Conference on Reliability and Quality in Design).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Estimating activation energy of the LiFePO4 battery using dual dynamic stress accelerated degradation tests
AU - Lin, Yu Chang
AU - Li, Yi Ru
AU - Chung, Kuan-Jung
PY - 2017/1/1
Y1 - 2017/1/1
N2 - This study mainly focused on evaluating the activation energy of LiFePO4 batteries by using a novel dual dynamic stress accelerated degradation test, called D2SADT. This test method was developed to simulate a situation involving driving an electric vehicle in the city. D2SADT contains two controllable dynamic stress variables: the environmental factor corresponding to temperature cycling and the power factor corresponding to charging-discharging currents and times at which they were implemented simultaneously. A reference power test was performed repeatedly at a certain time (e.g., five temperature cycles), and the cell capacity was then calculated to monitor the degradation of the batteries. A physical-based reliability model called Norris-landzberg equation was applied to compute the activation energy which is the indicator to explain the degradation behavior of the Li-ion battery using D2SADT. The test results indicate that the activation energy decreases when the capacity loss (before 10%) increases. It is concluded that the power fade may be accelerated when the charge-discharge cycle increases for the LiFePO4 battery operated a specific power-and-temperature cycling condition. The test is ongoing and the updated results are under analysis to help us understand the degradation mechanism of Li-ion batteries by more realistic test conditions.
AB - This study mainly focused on evaluating the activation energy of LiFePO4 batteries by using a novel dual dynamic stress accelerated degradation test, called D2SADT. This test method was developed to simulate a situation involving driving an electric vehicle in the city. D2SADT contains two controllable dynamic stress variables: the environmental factor corresponding to temperature cycling and the power factor corresponding to charging-discharging currents and times at which they were implemented simultaneously. A reference power test was performed repeatedly at a certain time (e.g., five temperature cycles), and the cell capacity was then calculated to monitor the degradation of the batteries. A physical-based reliability model called Norris-landzberg equation was applied to compute the activation energy which is the indicator to explain the degradation behavior of the Li-ion battery using D2SADT. The test results indicate that the activation energy decreases when the capacity loss (before 10%) increases. It is concluded that the power fade may be accelerated when the charge-discharge cycle increases for the LiFePO4 battery operated a specific power-and-temperature cycling condition. The test is ongoing and the updated results are under analysis to help us understand the degradation mechanism of Li-ion batteries by more realistic test conditions.
UR - http://www.scopus.com/inward/record.url?scp=85029669179&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029669179&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85029669179
T3 - Conference Proceedings - 23rd ISSAT International Conference on Reliability and Quality in Design
SP - 121
EP - 125
BT - Conference Proceedings - 23rd ISSAT International Conference on Reliability and Quality in Design
A2 - Pham, Hoang
PB - International Society of Science and Applied Technologies
ER -