Method and device for measuring non-aqueous electrolyte battery moisture

A non-aqueous electrolyte, wettability technology, applied in the direction of measuring devices, secondary batteries, secondary battery testing, etc.

Inactive Publication Date: 2008-11-26
SAMSUNG SDI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention seeks to solve the problems in the prior art when measuring the wettability of non-aqueous electrolyte batteries

Method used

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  • Method and device for measuring non-aqueous electrolyte battery moisture
  • Method and device for measuring non-aqueous electrolyte battery moisture
  • Method and device for measuring non-aqueous electrolyte battery moisture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The negative plate was fabricated through the following process: artificial graphite as the negative active material, styrene-butadiene rubber (SBR) as the binder, and carboxymethyl The cellulose was mixed to make a slurry, and the mixture was dispersed in water; and the slurry was coated on a copper foil in a thickness of 15 μm and dried, and then rolled using a roll press. The thickness of the mixture of the negative plate is 136μm, and the density of the mixture is 1.625g / cm 3 , making its capacity 2200mAh.

[0056] The standard definition of the negative plate is that the width of the coated part of the negative plate is 25mm (W) × 75mm (L), while the width of the non-coated part of the negative plate is 7mm (W) × 25mm (L) (W: width, L: length). A separator of rayon porous film (thickness: 50 μm) was inserted between two negative electrode plates, and both sides thereof were touched with a glass plate, and fixed by a circular flat magnet. The assembly consisting ...

Embodiment 2

[0058] Example 2 was tested under the same conditions as in Example 1, except that when forming the negative plate, the thickness of the mixture of the negative plate was 126 μm, and the density of the mixture was 1.651 g / cm 3 , and its capacity is 2400mAh. Similarly, Figure 5b Capacitance values ​​corresponding to various frequencies in terms of elapsed time obtained by converting impedance values ​​into capacitance are shown.

[0059]

[0060] refer to Figure 5a and 5b , which shows that Embodiments 1 and 2 have better resolution in the low frequency region of about 100 mHz than in the high frequency region. In addition, it can be appreciated that the capacitance value produced in the case of Example 2 having a high mixture density is lower than that produced in the case of Example 1 having a relatively low mixture density. Thus, the examples demonstrate the fact that the wettability of the electrode plates increases when the density of the mixture is low.

[0061] ...

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Abstract

The invention discloses a method for measuring wettability of a non-aqueous electrolyte cell and a device thereof, comprising: enclosing an electrode module into a case, and injecting electrolyte into the case equipped with the electrode module; after injecting the electrolyte, for certain scheduled time, infusing the electrolyte; after injecting the electrolyte, measuring capacitance value between an anode and a cathode through electrically connecting measuring terminals of a capacitance spectrometer with the anode and the cathode of the electrode module; estimating the wettability of the electrolyte in the electrode module through measured capacitance value.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2007-0050849 filed May 25, 2007, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to a non-aqueous electrolyte battery, and more particularly relates to a method and a device for measuring the wettability of a non-aqueous electrolyte battery. Background technique [0004] In general, as portable wireless devices such as video cameras, mobile phones, and notebook computers have been reduced in size and improved in performance, a great deal of research has been conducted on the use of secondary batteries as driving power sources for these portable wireless devices. Such secondary batteries include, for example, nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium secondary batteries, and the like. Among them, since lithium secondary bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04G01N27/22
CPCY02E60/10H01M10/4285H01M10/48H01M50/60
Inventor 张锡均金重锡林旿灿
Owner SAMSUNG SDI CO LTD
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