Dynamic SOC estimation method of energy storage battery against load power change
| Autor: | Mengjie Kang, Ye Xu, Yaobin Liu, Puyu Wang, Jianke Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Battery (electricity)
Computer science Process (computing) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Flow battery Automotive engineering Energy storage 0104 chemical sciences Power (physics) Variable (computer science) State of charge 0210 nano-technology Energy (signal processing) |
| Zdroj: | 2017 IEEE Conference on Energy Internet and Energy System Integration (EI2). |
| DOI: | 10.1109/ei2.2017.8245332 |
| Popis: | The existing definition of state of charge (SOC) cannot calculate under the circumstance of variable current or long-time heavy load discharge. Accordingly, it is necessary to propose a SOC definition based on energy theory. SOC is divided into static SOCs and dynamic SOCd to be applied the calculation of SOC in varied cases of energy storage battery. On this basis, considering the stored energy during the operation process is reduced constantly and the load power changes, dynamic SOCd estimation method is proposed. On a basis of experimental data on batteries carrying varied power loads, the algorithm fits the energy function of battery energy release with the changes of load power. According to the related standards, standard load is chosen. Refer to the definition of SOCS proposed in the preamble, the present stored energy of battery is calculated, the residual capacity from battery discharge until cut-off condition is solved, and estimation of dynamic SOCd is realized finally. As common energy storage equipment, the vanadium redox flow battery (VRB) is cited for experimental verification. The experiment proves that the method is easy to be implemented with less error. |
| Databáze: | OpenAIRE |
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