Method for correcting delay link of calorimetric process of calorimeter by utilizing transfer function

A technology of transfer function and process delay, applied in the field of calorimeter, can solve the problem that the influence of delay link cannot be completely eliminated, and achieve the effect of improving performance

Active Publication Date: 2018-12-18
TSINGHUA UNIV
View PDF13 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the compensation method can reduce the influence of the delay link to a certain extent, there are still problems of the rationality of using the first-order link

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
  • Method for correcting delay link of calorimetric process of calorimeter by utilizing transfer function
  • Method for correcting delay link of calorimetric process of calorimeter by utilizing transfer function
  • Method for correcting delay link of calorimetric process of calorimeter by utilizing transfer function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Taking the calibration resistance as the measured object, the step response correction of an isothermal calorimeter is used as embodiment 1;

[0064] 1) Select the isothermal calorimeter IBC-18650 of THT (Thermal Hazard Technology) company, select a cylindrical aluminum calibration resistor with a cross-sectional diameter of 26mm and a height of 65mm as the measured object, and take the calorimeter’s calorimetric process The delay link is divided into the heat delay link of the calorimeter and the heat conduction delay link of the measured object.

[0065] 2) Put the measured object selected in step 1) into the calorimeter, and the calorimeter starts to work and generates a continuous instrument measurement signal P c =P c (t), where t is a time-domain variable. The calorimeter samples the signal, the sampling interval is Δt, and the discrete instrument measurement signal sequence is obtained as P c (k)=P c (t k ), where k is a non-negative integer, and t k = kΔt....

Embodiment 2

[0085] Taking a 18650 battery as the measured object, the calorimetric correction of 0.5C, 1C, and 2C rate discharge at 25°C is used as Example 2;

[0086] 1) Select an isothermal calorimeter identical to that in Example 1, choose a 18650 battery with a cross-sectional outer diameter of 18 mm, an inner diameter of 2 mm, and a height of 65 mm as the measured object, and the delay link of the calorimetric process of the calorimeter It is divided into the heat delay link of the calorimeter and the heat conduction delay link of the measured object.

[0087] 2) Put the measured object selected in step 1) into the calorimeter, and the calorimeter starts to work and generates a continuous instrument measurement signal P c =P c (t), where t is a time-domain variable. The calorimeter samples the signal, the sampling interval is Δt, and the discrete instrument measurement signal sequence is obtained as P c (k)=P c (t k ), where k is a non-negative integer, and t k = kΔt.

[0088]...

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 method for correcting the delay link of a calorimetric process of a calorimeter by utilizing a transfer function, and belongs to the technical field of calorimeters. The method comprises the steps of: dividing the delay link of the calorimetric process of the calorimeter into a calorimetric delay link of the calorimeter and a heat conduction delay link of a measured object; putting the measured object in the calorimeter, wherein the calorimeter works to generate continuous instrument measurement signals; and furthermore, sampling is carried out; determining a calorimetric delay link transfer function of the calorimeter, and obtaining a sampling sequence of heat dissipation power of the measured object to the measurement cavity of the calorimeter by calculation; ifthe heat conduction feature time of the measured object is less than a heat conduction feather time threshold value, taking the sampling sequence as the true calorific value sampling sequence of the measured object; and otherwise, determining a heat conduction delay link transfer function of the measured object, and obtaining the true calorific value sampling sequence of the measured object by calculation, so that correction of the delay link of the calorimetric process of the calorimeter is completed. The method provided by the invention can be used for correcting influence of the delay linkof the calorimetric process of the calorimeter, so that the true calorific value of the measured object is obtained; the result is accurate; and operation is simple, convenient and rapid.

Description

Technical field: [0001] The invention relates to the technical field of calorimeters, in particular to a method for correcting a delay link in a calorimetric process of a calorimeter by using a transfer function. Background technique: [0002] The heat production value of the measured object is an important parameter reflecting the thermal characteristics of the object, and the accuracy of the measured heat production value is the key to related research. For example, lithium-ion batteries have been widely used, and their life, performance, and safety are closely related to their thermal characteristics. Accurate measurement of battery heat generation becomes the basis for solving thermal problems of lithium-ion batteries. [0003] A calorimeter is an instrument used to measure the heat produced by a measured object. For conventional calorimeters, take the isothermal calorimeter produced by THT (Thermal Hazard Technology) as an example. The instrument is mainly composed of ...

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): G05B11/42
CPCG05B11/42
Inventor 张剑波李哲滕冠兴葛昊
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap