Method for testing liquid absorption rate of battery diaphragm

A test method and battery diaphragm technology, applied in the direction of using material absorption and weighing, etc., can solve the problems of poor reproducibility and accuracy of test results, large diaphragm quality errors, and large impact on test results. The process is easy to standardize and quantify, Precise measurement, testing equipment and conditions require less effect

Inactive Publication Date: 2014-01-15
SHENZHEN SENIOR TECH MATERIAL
View PDF2 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large error in the weighing of the diaphragm after absorbing liquid, the reproducibility and accur

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 testing liquid absorption rate of battery diaphragm
  • Method for testing liquid absorption rate of battery diaphragm
  • Method for testing liquid absorption rate of battery diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings.

[0027] A method for testing the liquid absorption rate of a battery diaphragm, comprising the following steps:

[0028] (1) Cut a rectangular sample at a place where the battery separator to be tested is flat and uniform;

[0029] (2) The thickness of the sample is measured by the thickness gauge, and the calculated volume is V 1 ; The thickness of the intercepted diaphragm sample should be uniform, the surface should be flat, and the area should be 1-100cm 2 ;

[0030] (3), Put the glass container 6 and the cover 5 containing the electrolyte solution inside (refer to figure 1 , figure 2 with image 3 ) on an electronic balance with an accuracy of 0.0001g. After the value is stable, the reading is cleared; the thin plastic wire 2 passes through the small hole 501 of the glass cover 5, one end is tied to the glass rod 1, and the other end...

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 relates to the field of battery detection and discloses a method for testing the liquid absorption rate of a battery diaphragm. The method comprises the following steps: (1) intercepting a diaphragm sample; (2) measuring the volume of the diaphragm sample, and recording the volume as V1; (3) putting a container filled with an electrolyte on an electronic scale, making the reading return to zero, fixing a circular ring by using a fine line, and recording reading of the scale as M1 after the circular ring is completely immersed and suspended in the electrolyte; (4) fixing the diaphragm sample on the circular ring, repeating the step (3), and recording reading of the scale as M2 within 1-180 minutes; and (5) substituting a formula L=(rhoV1+M1-M2)/V1 of the liquid absorption rate, and calculating the liquid absorption rate L. The method has the advantages of simplness in operation, accurate test result, simple equipment, high operability, low test cost and the like.

Description

technical field [0001] The invention relates to the field of battery detection, in particular to a method for testing the liquid absorption rate of a battery diaphragm with simple operation and accurate testing. Background technique [0002] A lithium-ion battery consists of a positive electrode, a negative electrode, a separator, and an electrolyte. The separator is placed between the positive and negative electrodes. Its main function is to isolate the positive and negative electrodes, but to allow the ions in the battery to pass freely. The ion conductivity of the battery separator is directly related to the overall performance of the battery. The higher the conductivity of the diaphragm, the greater the amount of ions passing through the diaphragm per unit area per unit time. At this time, the charge and discharge performance of the battery will increase. [0003] The liquid absorption rate of the separator not only reflects the affinity between the separator and the e...

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): G01N5/02
Inventor 陈秀峰陈良吴术球杨佳富王今刚
Owner SHENZHEN SENIOR TECH MATERIAL
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