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A kind of lithium ion battery electrolyte or water identification method

A lithium-ion battery and electrolyte technology, applied in the field of electrolyte identification, can solve the problems of rapid, accurate, and low-cost identification of electrolytes, and achieve high practical value, low cost, and remarkable effects

Active Publication Date: 2019-05-21
NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that there is no fast, accurate and low-cost method for identifying the electrolyte in the prior art. The present invention provides a method for identifying the electrolyte or water of lithium-ion batteries

Method used

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  • A kind of lithium ion battery electrolyte or water identification method
  • A kind of lithium ion battery electrolyte or water identification method
  • A kind of lithium ion battery electrolyte or water identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment is used to illustrate the electrolyte identification method disclosed in the present invention.

[0050] Such as figure 1 As shown, two detection electrodes 4 are formed by using the copper wire of the network cable with a bare part of about 2-3 mm and placed in parallel with a distance of 2 mm. A detection electrode 4, a DC power supply 1 (6F22 battery), a light-emitting unit 2 formed by reverse-parallel connection of two red light-emitting diodes of φ=2.0mm, a current-limiting resistor 3 with a resistance value of 100Ω, and another detection electrode 4 in sequence connected in series to form a detection device.

[0051] Soak broad pH test paper in tap water and remove.

[0052] After pressing the two detection electrodes on the pH test paper for 3 seconds, observe the weak red light emitted by the light-emitting unit. Then remove the electrode and observe the marks on the test paper, such as figure 2 As shown, obvious blue traces and red traces c...

Embodiment 2

[0054] This embodiment is used to illustrate the identification method for lithium-ion battery electrolyte disclosed in the present invention.

[0055] The detection device and method of Example 1 were used to detect pure water.

[0056] Observe that the light emitting unit emits a very faint red light. Then remove the electrode and observe the marks on the test paper, such as image 3 As shown, a very obvious blue trace and a very faint red trace can be seen on the pH test paper. Therefore, it is judged that the liquid is pure water.

Embodiment 3

[0058] This embodiment is used to illustrate the identification method for lithium-ion battery electrolyte disclosed in the present invention.

[0059] Adopt the detecting device and the method of embodiment 1 to lithium hexafluorophosphate (LiPF 6 ) concentration of 20% electrolyte for detection.

[0060] Watch the light emitting unit glow bright red. After the pH test paper is soaked, the soaked part begins to appear very light red (the acidity in the electrolyte is low at this time). Press the detection electrode to the wet part of the pH test paper for 3 seconds, then remove the electrode and observe the marks on the test paper, such as Figure 4 As shown, there are obvious red indentations left on the pH test paper (acid or water is enriched at the indentation under the action of electric current, and develops color on the pH test paper), without blue traces. Therefore, it is judged that the liquid contains LiPF 6 type of electrolyte.

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Abstract

In order to solve the problem that a method of quickly and accurately identifying an electrolyte in is not available in the prior art, the invention provides an electrolyte identifying method. The electrolyte identifying method comprises the following steps of: S1, providing a detection device which comprises two detection electrodes, and a light source, a light emitting unit and a current-limiting resistor electrically connected to the two detection electrodes, wherein the light source, the light emitting unit and the current-limiting resistor are electrically connected between the two detection electrodes in series; S2, contacting a PH test strip with a to-be-detected liquid; S3, controlling the distance between the two detection electrodes at 0.5-3mm and pressing the two detection electrodes in parts, with the to-be-detected liquid, of the PH test strip; and S4, performing judgment according to the light emitting unit and color change on the PH test stripe. The method provided by the invention can quickly and accurately identify the electrolyte and the method is low in cost.

Description

technical field [0001] The invention provides an electrolyte identification method, especially an identification method for distinguishing lithium-ion battery electrolyte or water. Background technique [0002] After cleaning and reassembling the electrolyte barrel used to load the lithium battery electrolyte, it is usually checked for leaks by adding air and standing still to detect changes in air pressure. This method is relatively mature and easy to implement. However, when the leak point is very slight, and the gas leakage rate is only a few tenths of milliliters per hour or even less, the influence of temperature changes on air pressure is much greater than that caused by gas leakage. detection. Therefore, after filling the electrolyte, it is necessary to let the electrolyte barrel stand still to see if there will be a slight liquid leakage. Check visually for leaks. [0003] The leaked liquid can be observed by visual observation, but because the electrolyte is col...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G01N27/06G01N21/80G01M3/16
CPCG01M3/16G01N21/80G01N27/06G01N27/4166
Inventor 丁祥欢
Owner NANTONG CAPCHEM ELECTRONICS MATERIALS CO LTD
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