Abstract
Lithium-ion battery is the main component of fixed energy storage. It is necessary to establish an accurate model for lithium-ion batteries. Based on Thevenin equivalent circuit, a coupled electric-Thermal-Aging modeling method for power lithium-ion batteries is presented in this paper. Through the calculation formula of power lithium battery parameters, the model framework is built by simulation. After the data of the capacity test, HPPC (Hybrid Pulse Power Characteristic) test, high current temperature test and accelerated aging test are available, the parameters were identified by curve fitting. Three-dimensional table of lithium battery model parameters with different charging states and different aging degrees was established, and the simulation accuracy was verified under different operating conditions. In terms of thermal, the model has good temperature adaptability for different current rates. The simulation results show that the model can accurately reflect the terminal voltage, temperature and SOH of lithium batteries under various operating conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 269-276 |
| Number of pages | 8 |
| Journal | IET Conference Proceedings |
| Volume | 2022 |
| Issue number | 28 |
| State | Published - 2022 |
| Externally published | Yes |
| Event | 11th Annual Meeting of CSEE Study Committee of HVDC and Power Electronics, HVDC 2022 - Guangzhou, China Duration: 18 Dec 2022 → 21 Dec 2022 |
Keywords
- ELECTRIC-THERMAL-AGING COUPLING MODEL
- PARAMETER IDENTIFICATION
- POWER LITHIUM-ION BATTERY
- THEVENIN MODEL
