Review Article
The State of Charge Estimating Methods for Battery: A Review
Table 1
Classification of SOC estimating mathematical methods.
| Categories | Mathematical methods |
| Direct measurement | (i) Open circuit voltage method | (ii) Terminal voltage method | (iii) Impedance method | (iv) Impedance spectroscopy method |
| Book-keeping estimation | (i) Coulomb counting method | (ii) Modified Coulomb counting method |
| Adaptive systems | (i) BP neural network | (ii) RBF neural network | (iii) Support vector machine | (iv) Fuzzy neural network | (v) Kalman filter |
|
Hybrid methods | (i) Coulomb counting and EMF combination | (ii) Coulomb counting and Kalman filter combination | (iii) Per-unit system and EKF combination |
|
|