The MSQ1000 based on mass spectrometry sensor solves these problems perfectly!

Defects of Current Methods

Currently, there are two traditional methods used for electrolyte leak test of battery, one is VOC method, other is helium mass spectrometry method.

The common problem with VOC method is that the test results are very unstable. It has high environmental requirements, and is often interfered with by non electrolyte VOC gases, and leading to misjudgment.

Disadvantages of VOC in the application:

The helium mass spectrometry test method requires pre-pressurizating with helium into the inside of cell (or pre-filling the cell with helium). However, due to the helium bubble is light, it may rise to the upper part of the electrolyte, and the leak in the bottom of the cell may not be tested.

Failure Analysis of Helium Mass Spectrometry Leak Test

Solutions for Gas Analyzers (RGAs)

The MSQ1000 based on mass spectrometry sensor solves these problems perfectly!

Firstly, charge the sample gas molecules by ionizing them. When charged ions pass through the mass separator, only useful target ions are fed into the receiver, which greatly improves anti-interference performance!

In other words, mass spectrum analyzer is used to analyze gas components, which means that substances with a mass number of 1 to 100 can be all scanned by instrument. You can test whichever you care about, or you can skip scanning for those you don't care about.

For example, assuming we want to detect the light, VOC says:” there is the light coming, and the intensity is ...” But the Mass Spectrometer says:” the light is coming, the colors are..., the order is..., the intensity of each color is..., which color or colors of light do you want to test? I can ignore the rest!”

Mass number=Molecular weight/charge number.

The Principle of Mass Spectrum Analysis

The Schematic Diagram of Test Method I

The Schematic Diagram of Test Method II

How to select the characteristic peak for target signal

When a cell with unknown electrolyte composition is obtained, the following steps should be followed for analysis and verification:

Firstly, insulate the battery or cell (very important!! Especially the tabs!!).

Secondly, remove a certain amount of electrolyte from the tested cell and prepare for testing to find characteristic peaks.

Thirdly, place the electrolyte in a vacuum chamber, and insure vacuum high enough, use MSQ1000 scanning the mass number from 1 to 100, and record these characteristic peaks values.

Fourthly, confirm the target characteristic peaks. Analyze characteristic peaks and select appropriate characteristic peaks as test target peaks, and then setup the instrument.

Fifth, test these cells, compare and analyze data with the result of Leak Standard, determine approximate judgment criteria, and subsequently verify and adjust.

Finally, when testing the PACK, pay attention to analyzing the high-risk substances in the testing system that may cause misjudgment, such as alcohol, coolant, cleaning agents, etc..

Attention: The test was conducted under high vacuum, please confirm that there will be no additional quality issues with the battery or cell under this condition!!

Application Process

The core of the application of leak test of the electrolyte

  For the application of electrolyte leak testing, there are two key points:

  Do our best to meet these two conditions!!

Mass Spectrometer Family: MSQ=Mass Spectrometer Q Series

>MSQ1000 Series

    Standard instrument composed of MS core module + sampling system.

>MSQ2000 Series

    A customized test system consisting of MSQ1000 + external test system + backing pump + auxiliary pump + movable vehicle.

>TC01/02/05/10=10L/ (Empty=rigid test chamber + F=flexible test chamber), TC=Test Chamber

>D-MASTER, D=DMC, Model DM05=DMC leak rate 1.xE-05mbar.l/s.

Standard Instrument-Test Information

Core Competitiveness

Other Instruments-Air Leak Tester