Abstract
The main problems of existing SOC (state of charge) definition methods were analyzed, the concept of maximum available capacity was proposed based on the open circuit voltage (OCV) of a battery, and the battery SOC was redefined, thus the decoupling of a battery's charge/discharge capacity and work condition was realized. Through updating the maximum available capacity of a battery, the effect of aging on the SOC estimation accuracy was avoided. By converting the internal resistance voltage drop and the polarization voltage into the loss of discharge capacity, a method for calculating the actual available capacity of a battery or a battery pack was achieved, and its validity and feasibility were verified.
| Original language | English |
|---|---|
| Pages (from-to) | 975-979 |
| Number of pages | 5 |
| Journal | Gaojishu Tongxin/High Technology Letters |
| Volume | 22 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sept 2012 |
Keywords
- Actual available capacity
- Electric vehicles
- Maximum available capacity
- State of charge (SOC)
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Wen, F., Lin, C., Jiang, J., Zhang, W., & Wang, Z. (2012). SOC definition and estimation for EV Li-ion batteries. Gaojishu Tongxin/High Technology Letters, 22(9), 975-979. https://doi.org/10.3772/j.issn.1002-0470.2012.09.014