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Equivalent circuit model of super capacitor and construction method

A technology of equivalent circuit model and supercapacitor, which is applied in the direction of measuring current/voltage, CAD circuit design, measuring resistance/reactance/impedance, etc., can solve the problems affecting the accuracy of the model, the large deviation between internal resistance and actual value, etc., to improve Effects of model accuracy, reduction of model error, and improvement of estimation accuracy

Pending Publication Date: 2022-04-05
上海交通大学宁波人工智能研究院
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  • Abstract
  • Description
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Problems solved by technology

This patented technology has shortcomings. The same internal resistance-SOC function is used in different rate current discharge experiments, which will lead to a large deviation between the internal resistance and the actual value when the current is different, and affect the accuracy of the model.

Method used

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  • Equivalent circuit model of super capacitor and construction method
  • Equivalent circuit model of super capacitor and construction method
  • Equivalent circuit model of super capacitor and construction method

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Embodiment Construction

[0092] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0093] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, some places in the drawings schematically exaggerate the thickness of components appropriately.

[0094] The inventor has designed an equivalent circuit model of a supercapacitor, including an equivalent circuit model...

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Abstract

The invention discloses an equivalent circuit model of a super capacitor, which relates to the technical field of battery management systems and comprises a super capacitor, an internal resistance switch control module, a nonlinear equivalent circuit model module, a terminal voltage module and a hysteresis voltage compensation module which are sequentially connected in series. The invention discloses a method for constructing an equivalent circuit model of a super capacitor. The method comprises the steps of S100, charging and discharging testing, S200, parameter identification and S300, actual working condition parameter verification. According to the method, the charging and discharging characteristics of the super capacitor can be accurately fitted, and the problem that the SOC estimation error is large due to low precision and poor real-time performance of an existing super capacitor model is solved.

Description

technical field [0001] The invention relates to the technical field of battery management systems, in particular to an equivalent circuit model and a construction method of a supercapacitor. Background technique [0002] As a new energy storage device, supercapacitors are widely used in solar and wind power generation energy storage systems, new energy vehicles and other fields. [0003] Like the gas gauge of traditional fuel vehicles, new energy vehicles also need to give users information such as remaining mileage or remaining power, and the accuracy of remaining power or mileage information will also provide convenience to users and reduce mileage anxiety during driving. It can also try to avoid overcharging and overdischarging of supercapacitors and other behaviors that affect life. The "fuel gauge" in new energy vehicles needs to estimate the remaining power through the monitored data such as the output current and voltage of the super capacitor. This process is the St...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26G01R19/165G06F30/30
Inventor 张诚琚长江杨根科熊灿王禹晨
Owner 上海交通大学宁波人工智能研究院
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