Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fuel cell diagnosis method and diagnosis system

A fuel cell and equation technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of computational complexity and large amount of calculation, and low efficiency of fuel cell internal state diagnosis, so as to reduce complexity and calculation amount Effect

Active Publication Date: 2021-02-26
SHANGHAI HYDROGEN PROPULSION TECH CO LTD
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this parameter determination method based on nonlinear least squares fitting has a large computational complexity and a large amount of computation, resulting in low diagnostic efficiency of the internal state of the fuel cell.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel cell diagnosis method and diagnosis system
  • Fuel cell diagnosis method and diagnosis system
  • Fuel cell diagnosis method and diagnosis system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The above is the core idea of ​​the present invention. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention Description, obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] The embodiment of the present invention provides a fuel cell diagnosis method, such as figure 1 shown, including:

[0052] S101: Inject synchronous multi-frequency current excitation into the fuel cell;

[0053] Such as fig...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a fuel cell diagnosis method and a diagnosis system. The diagnosis method comprises the following steps of: injecting synchronous multi-frequency current excitation into a fuelcell; collecting a time domain current excitation signal and a voltage feedback signal of the fuel cell, and calculating alternating current impedance spectrum data under different frequency points; constructing an alternating-current impedance spectrum model of the fuel cell, and converting a nonlinear model equation of the alternating-current impedance spectrum model into a linear model equation; fitting the alternating-current impedance spectrum data and the linear model equation according to a least square method principle to obtain parameter values of the alternating-current impedance spectrum model; acquiring feature vectors of the fuel cell according to the parameter values; classifying the feature vectorsby adopting a fault classification algorithm, and diagnosing the working stateof the fuel cell according to the classification result, fitting the linear model equation to greatly reduce the calculation complexity and the calculation amount. The problems of easy falling into local optimum and low precision due to the adoption of a nonlinear least square fitting method are also avoided.

Description

technical field [0001] The present invention relates to the technical field of fuel cells, more specifically, to a fuel cell diagnostic method and diagnostic system. Background technique [0002] A fuel cell is a device that converts chemical energy stored in fuel and oxidant into electrical energy through an electrochemical reaction. Although fuel cells have the advantages of low reaction temperature, fast dynamic response, high reaction efficiency, and high power density, they are prone to reaction starvation caused by insufficient gas supply and membrane dryness and water damage caused by improper water management during operation. Faults such as flooding, therefore, lead to the problems of short life and poor reliability of the fuel cell. [0003] In order to improve the reliability and service life of the fuel cell, it is necessary to diagnose and control the internal state of the fuel cell in real time. Since electrochemical impedance spectroscopy, also known as AC i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01R31/389G01R31/367G01R31/378
CPCG01R31/367G01R31/378G01R31/389
Inventor 单璟李权王克勇王鸿鹄蔡俊侯中军
Owner SHANGHAI HYDROGEN PROPULSION TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com