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Super capacitor set charge state testing method and device

A technology of supercapacitors and state of charge, which is applied in the direction of measuring devices, measuring current/voltage, instruments, etc., and can solve the problems of low accuracy of detection methods

Inactive Publication Date: 2014-07-02
SMART CITIES SYST SERVICES PRC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a method and device for detecting the state of charge of a supercapacitor bank, aiming to solve the problem of low accuracy of the existing supercapacitor bank SOC detection method

Method used

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  • Super capacitor set charge state testing method and device
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  • Super capacitor set charge state testing method and device

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Embodiment 1

[0038] Embodiment 1 of the present invention proposes a method for detecting the state of charge of a supercapacitor bank. like figure 1 As shown, the method of Embodiment 1 of the present invention includes steps:

[0039] S1. Determine the state equation and output equation according to the circuit model of the supercapacitor monomer in the supercapacitor bank. like figure 2 As shown, the supercapacitor bank according to Embodiment 1 of the present invention includes at least two supercapacitor modules, and the supercapacitor modules are connected in series. The supercapacitor module includes only one supercapacitor cell.

[0040] image 3 Shown is the classical first-order nonlinear equivalent circuit model of the supercapacitor monomer in Embodiment 1 of the present invention. Embodiment 1 of the present invention takes the first-order nonlinear equivalent circuit model of the supercapacitor monomer as an example to establish the monomer state space Model, the circui...

Embodiment 2

[0161] Embodiment 2 of the present invention proposes a method for detecting the state of charge of a supercapacitor bank. like Figure 4 As shown, in the second embodiment of the present invention, on the basis of the first embodiment of the present invention, it also includes:

[0162] Step S5, when the terminal voltage value of the target to be measured is lower than the preset first threshold and exceeds the preset first time; or, when the terminal voltage value of the target to be measured is higher than the preset second threshold and exceeds the preset When the second time set, a warning is issued.

[0163] In step S4 of Embodiment 1 of the present invention, the SOC value of the entire supercapacitor bank is calculated by a simple average sum method. In some extreme special cases, individual supercapacitor monomers may be overcharged or overcharged. Discharge phenomenon, but for the first embodiment of the present invention, this situation can be avoided. Because in...

Embodiment 3

[0166] Embodiment 3 of the present invention proposes a device for detecting the state of charge of a supercapacitor bank. like Figure 5 As shown, the device of the third embodiment of the present invention includes: a modeling module 10, which is used to determine the state equation and output equation according to the circuit model of the supercapacitor monomer in the supercapacitor bank; The operating current value and terminal voltage value of N targets to be measured; the target to be measured is a supercapacitor monomer; the first calculation module 30 is used to perform non-destructive Kalman filter algorithm, The strong tracking filter algorithm, the state equation and the output equation calculate the state of charge value of the target to be measured; the second calculation module 40 is used to calculate the state of charge value of the supercapacitor bank according to the state of charge value of the target to be measured.

[0167] like figure 2 As shown, the su...

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Abstract

The invention belongs to the technical field of super capacitor set energy storage and provides a super capacitor set charge state testing method and device. The method comprises the steps that a state equation and an output equation are determined according to a circuit model of a super capacitor single body in a super capacitor set; the working current values and the end voltage values of N targets to be tested in the super capacitor set are detected in real time; the targets to be tested are the super capacitor single bodies; N is larger than or equal to 2 and is smaller than the number of all the super capacitor single bodies in the super capacitor set; according to the working current values and the end voltage values of the targets to be tested, a lossless Kalman filtering algorithm, a strong tracking filtering algorithm, the state equation and the output equation, the charge state values of the targets to be tested are computed; and according to the charge state values of the targets to be tested, the charge state value of the super capacitor set is computed. According to the method and device, the charge state of the super capacitor set can be measured accurately.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor bank energy storage, and in particular relates to a method and a device for detecting the state of charge of a supercapacitor bank. Background technique [0002] A supercapacitor, also known as an electrical double layer capacitor (Electrical Doule-Layer Capacitor), is a new type of energy storage device that stores energy through a polarized electrolyte. Supercapacitors can be repeatedly charged and discharged hundreds of thousands of times, and have the characteristics of short charging time, long service life, high power density, good temperature characteristics, energy saving and environmental protection. Because supercapacitors have more prominent advantages, they have been widely used in more and more fields, such as hybrid vehicles, energy storage systems, smart grids, aerospace and so on. [0003] Due to the relatively low voltage of supercapacitor cells (generally no more than 4V)...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R19/165
Inventor 陈念黄卜夫张璞阳
Owner SMART CITIES SYST SERVICES PRC
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