Abstract
At low temperatures, the available capacity and power of lithium-ion battery will significantly reduce, and charging is difficult. Low-temperature heating is an effective way to improve the performance of battery. In this paper, an electro-thermal coupled model was established, and a self-heating strategy of variable-frequency and variable-amplitude (VFVA) AC was proposed. Under the condition that the amplitude of polarization voltage was constant, the frequency and amplitude of the AC excitation were adjusted in real time according to the optimal heating frequency obtained at each temperature, which aimed at maximizing heating power. It is found that the VFVA AC self-heating strategy has a good effect and the battery temperature has risen 47.67℃in700s. Compared with the constant-frequency and variable- amplitude (CFVA) AC self-heating strategy, VFVA AC self-heating strategy has a maximum increase of 21.85% in the temperature rising rate. Therefore, the VFVAAC self-heating strategy is conducive to the promotion and application of electric vehicles in cold environment.
| Translated title of the contribution | A Variable-Frequency and Variable-Amplitude AC Low-Temperature Self-Heating Strategy for Lithium-Ion Battery |
|---|---|
| Original language | Chinese (Simplified) |
| Pages (from-to) | 1798-1805 |
| Number of pages | 8 |
| Journal | Diangong Jishu Xuebao/Transactions of China Electrotechnical Society |
| Volume | 34 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 10 May 2019 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019, Electrical Technology Press Co. Ltd. All right reserved.
Keywords
- Lithium-ion battery
- Low-temperature self-heating
- Electro-thermal coupled model
- Variable-frequency and variable-amplitude
ASJC Scopus subject areas
- Electrical and Electronic Engineering
