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Unscented Particle Filter for SOC Estimation Algorithm Based on a Dynamic Parameter Identification
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DOI：10.1155/2019/7452079.png)
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摘要
En 中文
In order to solve the problem that the model-based State of Charge (SOC) estimation method is too dependent on the model parameters in the SOC estimation of electric vehicles, an improved genetic algorithm is proposed in this paper. The method has the advantages of being able to quickly determine the search range, reducing the probability of falling into local optimum, and having high recognition accuracy. Then we can realize online dynamic identification of power battery model parameters and improve the accuracy of model parameter identification. In addition, considering the complex application environment and operating conditions of electric vehicles, an SOC estimation method based on improved genetic algorithm and unscented particle filter (improved GA-UPF) is proposed. And we compare the improved GA-UPF algorithm with the least square unscented particle filter (LS-UPF) and improved GA unscented Kalman filter (improved GA-UKF) algorithm. The comparison results show that the improved GA-UPF algorithm proposed in this paper has higher estimation accuracy and better stability. It also reflects the practicability and accuracy of the improved GA parameter identification algorithm proposed in this paper.
Keyword:
LITHIUM-ION BATTERY
OF-CHARGE ESTIMATION
MANAGEMENT-SYSTEMS
POLYMER BATTERY
KALMAN FILTER
STATE
MODEL
PACKS
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