Lithium ion battery nonlinear modeling method based on Hammerstein-CARMA
The invention provides a lithium ion battery nonlinear modeling method based on Hammerstein-CARMA, belongs to the technical field of lithium ion batteries, and solves the technical problem of low precision of a traditional lithium ion battery equivalent circuit model. According to the technical sche...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention provides a lithium ion battery nonlinear modeling method based on Hammerstein-CARMA, belongs to the technical field of lithium ion batteries, and solves the technical problem of low precision of a traditional lithium ion battery equivalent circuit model. According to the technical scheme, the method comprises the following steps that 1, load current and terminal voltage data of a battery are measured through intermittent constant-current discharge, and the OCV-SOC relation is determined; (2) a lithium ion battery nonlinear model based on Hammerstein-CARMA is established; step 3), constructing an algorithm process of COA; 4) introducing a plurality of improvement measures on the basis of the COA, and constructing an ICOA; and 5) identifying model parameters by using ICOA and predicting the terminal voltage of the lithium ion battery. The method has the advantages that the improved suburb wolf optimization algorithm is used for parameter identification, the identification precision is high, and th |
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