Method and apparatus for parameter identification of equivalent circuit model of lithium ion battery

An equivalent circuit model, lithium-ion battery technology, applied in measurement devices, measurement of electricity, measurement of electric variables, etc., can solve the problems of complex calculation and large amount of calculation, and achieve the effect of avoiding matrix operation and the calculation process being clear and simple.

Active Publication Date: 2017-06-30
CH AUTO TECH CORP CO LTD
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  • Abstract
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Problems solved by technology

[0004] In the prior art, when identifying the parameters of the automotive lithium-ion battery, comple

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  • Method and apparatus for parameter identification of equivalent circuit model of lithium ion battery
  • Method and apparatus for parameter identification of equivalent circuit model of lithium ion battery
  • Method and apparatus for parameter identification of equivalent circuit model of lithium ion battery

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Embodiment Construction

[0053] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals represent the same parts.

[0054] For the sake of brevity and intuition in description, the solution of the present invention is described below by describing several representative implementation manners. Numerous details in the embodiments are only used to help the understanding of the solutions of the present invention. But obviously, the technical solutions of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the solution of the present invention, some embodiments are not described in detail, but only a framework is given. Hereinafter, "including" means "including but not limited to", and "according to..." means "at least accordin...

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Abstract

The invention provides a method and apparatus for parameter identification of an equivalent circuit model of a lithium ion battery. The method comprises: executing a composite pulse power characteristic test on a lithium ion battery to determine the battery-side voltage response curve; carrying out curve fitting on the battery-side voltage response curve to determine an exponential equation expression; and determining a battery-side voltage equation expression based on an equivalent circuit model of a lithium ion battery and comparing coefficients of the battery-side voltage equation expression with coefficients of the exponential equation expression to determine a battery polarization resistance and a battery polarization capacitance. According to the method provided by the invention, with a curve fitting way, identification of the battery polarization resistance and the battery polarization capacitance is realized and the computing process becomes clear and simple, so that complicated matrix computing during parameter identification in the prior art can be avoided.

Description

technical field [0001] The invention relates to the technical field of automobiles, and more specifically, to a method and device for identifying parameters of an equivalent circuit model of a lithium-ion battery. Background technique [0002] Energy shortages, oil crises and environmental pollution are intensifying, which have a huge impact on people's lives and are directly related to the sustainable development of the country's economy and society. All countries in the world are actively developing new energy technologies. As a new energy vehicle with reduced oil consumption, low pollution, and low noise, electric vehicles are considered to be an important way to solve the energy crisis and environmental degradation. Hybrid vehicles take into account the advantages of pure electric vehicles and traditional internal combustion engine vehicles at the same time. On the premise of meeting the requirements of vehicle power and mileage, it effectively improves fuel economy and...

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/389
Inventor 陆群钟柳芳
Owner CH AUTO TECH CORP CO LTD
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