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Method for establishing lithium ion battery power input electrothermal coupling model

A lithium-ion battery and electrothermal coupling technology, which is applied in electrical digital data processing, instruments, calculations, etc., can solve the problems of large internal resistance model errors, failure to consider battery electrothermal coupling characteristics, and inability to reflect battery polarization, etc., to achieve heat conduction The effect of high coefficient and uniform temperature distribution

Pending Publication Date: 2020-11-10
CHONGQING UNIV +1
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Problems solved by technology

At present, most of the battery models in the simulation model of the new energy vehicle powertrain system are internal resistance models, and the internal resistance model does not reflect the battery polarization phenomenon, nor does it take into account the electric-thermal coupling characteristics of the battery, so the error of the internal resistance model is relatively large

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  • Method for establishing lithium ion battery power input electrothermal coupling model
  • Method for establishing lithium ion battery power input electrothermal coupling model
  • Method for establishing lithium ion battery power input electrothermal coupling model

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Embodiment Construction

[0084] 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 various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0085] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should not be c...

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Abstract

The invention relates to a method for establishing a lithium ion battery power input electrothermal coupling model, and belongs to the technical field of battery management. The method comprises the following steps: step 1, constructing a lithium ion battery power input equivalent circuit model; step 2, identifying parameters of the model; step 3, building a power input electrothermal coupling model based on a Matlab / Simulink simulation platform, and verifying the model precision under a dynamic working condition; and step 4, applying the power input battery coupling model to the new energy automobile power assembly system simulation model. The model provided by the invention can accurately describe the dynamic response of the battery, is applied to a power assembly system model of a new energy automobile, and has important significance for improving the precision of the power assembly system model of the new energy automobile and the rationality of a control strategy.

Description

technical field [0001] The invention belongs to the technical field of battery management, and relates to a method for establishing a lithium-ion battery power input electrothermal coupling model. Background technique [0002] The battery model is an important part of the simulation model of the new energy vehicle powertrain system. Whether the battery model can accurately reflect the dynamic response of the battery determines the accuracy of the powertrain system simulation model and the rationality of the control strategy. [0003] The electrical and thermal characteristics of lithium-ion batteries are coupled with each other: battery temperature will cause changes in electrical parameters such as battery capacity and internal resistance, thereby affecting the electrical dynamic response of the battery; changes in electrical parameters such as battery charge and discharge current, open circuit voltage, capacitance and resistance will change The heat generation rate of the ...

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Application Information

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IPC IPC(8): G06F30/3323G06F30/367G06F119/08
CPCG06F30/3323G06F30/367G06F2119/08
Inventor 胡明辉周安健陈伦国傅春耘金国庆孙冬野石万凯
Owner CHONGQING UNIV
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