Control-oriented lithium battery thermal model establishing method

A method of establishing a lithium battery technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems that the temperature distribution of the battery cannot be obtained more accurately, the model calculation complexity is high and cannot be used, and the model range is not wide.

Active Publication Date: 2020-05-12
CHONGQING UNIV +1
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  • Abstract
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Problems solved by technology

Existing control-oriented thermal models have shortcomings such as the model is too simplified and cannot accurately obtain the temperature distribution inside the battery or the model is not applicable to a wide range.
Although the design-oriented th

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  • Control-oriented lithium battery thermal model establishing method
  • Control-oriented lithium battery thermal model establishing method
  • Control-oriented lithium battery thermal model establishing method

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Embodiment Construction

[0072] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematically illustrating the basic idea of ​​the present invention, and the following embodiments and the features in the embodiments can be combined with each other under the condition of no conflict.

[0073] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should not be const...

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Abstract

The invention relates to a control-oriented lithium battery thermal model establishing method, and belongs to the technical field of battery management. The method comprises the following steps of S1,performing order reduction on second-order partial differential heat conduction equations of cylindrical and square lithium batteries based on a spectrum-Galerkin method, and establishing control-oriented thermal models of the cylindrical and square lithium batteries; S2, selecting a cylindrical lithium battery and a square lithium battery, performing dynamic working condition test on the cylindrical lithium battery and the square lithium battery, and establishing a dynamic working condition data set of the batteries; S3, selecting a group of typical dynamic working condition data, and identifying unknown parameters of the lithium battery thermal model offline based on an optimal parameter identification algorithm; and S4, verifying the model precision and the working condition adaptability of the thermal model by adopting other working condition data in the dynamic working condition data set. Compared with the prior art, the modeling technology has the advantages that the modeling technology is not limited by the geometrical shape of the battery, the established thermal model is efficient in calculation and globally optimal, and detailed temperature information in the battery canbe extracted.

Description

technical field [0001] The invention belongs to the technical field of battery management and relates to a control-oriented lithium battery thermal model establishment method. Background technique [0002] Lithium-ion batteries are widely used in the development of green transportation due to their advantages such as high specific power, large specific energy, no memory effect, low self-discharge rate and good charge and discharge characteristics. However, with the widespread use of lithium batteries, the thermal safety of lithium batteries has become increasingly prominent. Under some typical high-power working conditions, the temperature difference between the inside and outside of the battery may even exceed 10°C. If it is not monitored in time, it is easy to cause the battery temperature to be too high, and even trigger thermal runaway, which may cause fire, electrolyte leakage and other accidents. Moreover, the battery operating temperature has a strong correlation wit...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/08G01R31/367
CPCG01R31/367Y02E60/10
Inventor 胡晓松刘文学谢翌刘波李佳承
Owner CHONGQING UNIV
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