期刊
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
卷 19, 期 6, 页码 7508-7516出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TII.2022.3212279
关键词
3-D thermal diffusion; control-oriented model; Galerkin-spectral method; lithium-ion batteries
This work develops a Galerkin-spectral model for the 3-D thermal diffusion in pouch cells, which is essential for onboard temperature monitoring of lithium-ion batteries in automobile applications. The model is obtained by space decomposition and simplification of the original physical model, and a low-order representation is extracted using spectral expansion. Experimental and simulation studies demonstrate the satisfactory reduced-order performance and practical validity of the proposed model.
Control-oriented thermal models are essential for onboard temperature monitoring of lithium-ion batteries in automobile applications. This work develops a Galerkin-spectral model for the 3-D thermal diffusion in pouch cells. First, a full-order model that depicts the battery thermal phenomenon is introduced from a physical point of view. Considering different physical properties in each area, we apply a space decomposition approach to decouple the interactive thermal effects between the cell core and tabs. Then, mild approximations are made to generate a more succinct model governed by the partial and ordinary differential equations. Finally, a low-order representation is extracted from the original infinite-dimensional system by employing spectral expansion on the spatiotemporal variable. Experimental and simulation studies indicate satisfactory reduced-order performance and practical validity of the proposed model.
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