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A method for testing moisture content in pole pieces

A test method and moisture technology, which is applied in the direction of chemical method analysis, measuring devices, and analysis materials, can solve the problems of large differences in parallel test results, and achieve the effect of simple and convenient operation and accurate test results

Inactive Publication Date: 2011-12-21
LISHEN POWER BATTERY SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The uniformity of the electrode piece and whether the moisture of the electrode piece is completely baked out during the test are the main factors affecting the test results. The traditional test method is to put the sample bottle containing the electrode piece to be tested directly into the heating furnace for testing. Parallel test results of samples vary widely

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for testing moisture content in a pole piece, which is tested by a Karl Fischer moisture tester, and the specific steps are:

[0020] (1) Dry the sample bottle in an oven at 120°C for 3 hours to remove the moisture in the sample bottle to reduce the background value of the instrument and the interference to the sample test value;

[0021] (2) Put the electrode piece into the dried sample bottle, seal it and place it in an oven for pre-baking at 145°C for 30 minutes;

[0022] (3) Put the pre-baked sample bottle into a heating furnace at 170°C quickly for testing. The test method is that the water vapor baked out enters the reaction kettle with the dry carrier gas and I 2 A quantitative chemical reaction takes place, according to the consumption of I 2 Calculate the amount of moisture involved in the reaction, so as to obtain the moisture content value in the pole piece.

Embodiment 2

[0024] A method for testing moisture content in a pole piece, which is tested by a Karl Fischer moisture tester, and the specific steps are:

[0025] (1) Dry the sample bottle in an oven at 120°C for 3 hours to remove the moisture in the sample bottle to reduce the background value of the instrument and the interference to the sample test value;

[0026] (2) Put the electrode piece into the dried sample bottle, seal it and place it in an oven for pre-baking at 140°C for 35 minutes;

[0027] (3) Put the pre-baked sample bottle into a heating furnace at 170°C quickly for testing. The test method is that the water vapor baked out enters the reaction kettle with the dry carrier gas and I 2 A quantitative chemical reaction takes place, according to the consumption of I 2 Calculate the amount of moisture involved in the reaction, so as to obtain the moisture content value in the pole piece.

Embodiment 3

[0029] A method for testing moisture content in a pole piece, which is tested by a Karl Fischer moisture tester, and the specific steps are:

[0030] (1) Dry the sample bottle in an oven at 120°C for 3 hours to remove the moisture in the sample bottle to reduce the background value of the instrument and the interference to the sample test value;

[0031] (2) Put the electrode piece into the dried sample bottle, seal it and place it in an oven for pre-baking at 130°C for 40 minutes;

[0032] (3) Put the pre-baked sample bottle into a heating furnace at 170°C quickly for testing. The test method is that the water vapor baked out enters the reaction kettle with the dry carrier gas and I 2 A quantitative chemical reaction takes place, according to the consumption of I 2 Calculate the amount of moisture involved in the reaction, so as to obtain the moisture content value in the pole piece.

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Abstract

The invention provides a method for testing the moisture content in pole pieces, which is tested by a Karl Fischer moisture tester. The specific steps are: (1) place the sample bottle in an oven and dry it at 120°C for 3 hours, and remove the moisture content in the sample bottle. Moisture, to reduce the background value of the instrument and the interference to the sample test value; (2) Put the pole piece into the sample bottle after drying, seal it and place it in an oven for 20-40min at 130-150°C for pre-baking; (3) ) quickly put the pre-baked sample bottle into a heating furnace at 170°C for testing; in the test method, the pole piece is prebaked under specific temperature and time conditions, so that the moisture in the pole piece during the test It is easier to bake all at one time, the test results are more accurate, and the operation is simple and convenient, which is suitable for the needs of large-scale industrial production.

Description

technical field [0001] The invention relates to a method for testing moisture content in the technical field of lithium ion battery manufacturing, in particular to a method for testing moisture content in pole pieces. Background technique [0002] In the manufacturing process of lithium-ion batteries, the positive and negative electrodes have a great influence on the performance of lithium batteries. Therefore, it is particularly important to accurately test the moisture content in the positive and negative electrodes. [0003] The uniformity of the electrode piece and whether the moisture of the electrode piece is completely baked out during the test are the main factors affecting the test results. The traditional test method is to put the sample bottle containing the electrode piece to be tested directly into the heating furnace for testing. Parallel test results of samples vary greatly. [0004] Therefore, it is of great practical significance to develop a test method wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00
Inventor 荣强王淑霞
Owner LISHEN POWER BATTERY SYST CO LTD
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