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논문 기본 정보

자료유형
학술저널
저자정보
Yanbo Che (Tianjin University) Jingjing Jia (Tianjin University) Yuexin Yang (Tianjin University) Shaohui Wang (Tianjin University) Wei He (State Grid Jiangxi Electric Power Research Institute)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.13 No.4
발행연도
2018.7
수록면
1,759 - 1,768 (10page)

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초록· 키워드

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The energy density, power density and ohm resistance of battery change significantly as results of battery aging, which lead to decrease in the accuracy of the equivalent model. A parameter identification method of the equivale6nt circuit model with 3 R-C branches based on the test database of battery life cycle is proposed in this paper. This database is built on the basis of experiments such as updating of available capacity, charging and discharging tests at different rates and relaxation characteristics tests. It can realize regular update and calibration of key parameters like SOH, so as to ensure the reliability of parameters identified. Taking SOH, SOC and T as independent variables, lookup table method is adopted to set initial value for the parameter matrix. Meanwhile, in order to ensure the validity of the model, the least square method based on variable forgetting factor is adopted for optimizing to complete the identification of equivalent model parameters. By comparing the simulation data with measured data for charging and discharging experiments of Li-ion battery, the effectiveness of the full life cycle database and the model are verified.

목차

Abstract
1. Introduction
2. Equivalent Circuit Model with 3 R-C Branches
3. Establishment of Life Cycle Test Database
4. Parameter Identification Driven by On-line data
5. Case Study
6 Conclusion
References

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UCI(KEPA) : I410-ECN-0101-2018-560-002230868