Three-electrode battery and preparation method thereof

A three-electrode and battery technology, applied in the field of lithium-ion batteries, can solve problems such as damage to charged batteries, three-electrode failure, impact analysis, etc., to reduce errors, make up for analysis and detection vacancies, and improve efficiency.

Pending Publication Date: 2020-04-24
东莞维科电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) Select a new sample, first prepare an uncharged three-electrode battery, and then charge it through a process such as chemical formation. This method can only be analyzed for batteries similar to the failed battery, but cannot be targeted for analysis of the charged lithium battery. The damage of the positive and negative plates (especially the failed lithium battery); in addition, some of the failed batteries are directly assembled into the three-electrode battery for analysis, but due to the defects in the three-electrode preparation method, the test results There is a great deal of unreliability
[0006] 2) Disassemble the failed battery, select the positive and negative plates and other parts to remake, this method destroys the original charged battery, and the newly prepared three electrodes can not guarantee that the selected part can replace the whole because only a part is selected, At the same time, the interior of the lithium battery is relatively complex, and there may be some differences between the local and the whole, which will affect the analysis.
The battery design in the three-electrode device is also an uncharged three-electrode battery, and it is a conventional assembly method. The obtained three-electrode battery cannot guarantee the accuracy of subsequent detection and analysis.

Method used

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  • Three-electrode battery and preparation method thereof
  • Three-electrode battery and preparation method thereof

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preparation example Construction

[0036] A method for preparing a three-electrode battery, comprising the steps of:

[0037] S1, connecting the first tab 11 to the positive and negative tabs of the charged cell body 1 respectively, wherein the first tab 11 is partly exposed outside the battery case 3;

[0038] S2, coating the diaphragm 22 on the reference electrode 2 and connecting the second tab 21, the second tab 21 is partially exposed outside the battery case 3, and the second tab 21 is welded to the reference electrode 2 or connected to the reference electrode 2 is integrally formed, the diaphragm 22 is set in the battery case 3, and the reference electrode 2 is kept out of contact with the charged cell body 1;

[0039] S3, first insulate the metal part outside the primary battery shell of the charged cell body, and use insulating tape to avoid short circuit of the charged cell during top sealing; then top seal the three-electrode battery, among which, the top seal The packaging temperature is 160-200°C,...

Embodiment 1

[0044] A method for preparing a three-electrode battery, comprising the steps of:

[0045] S1, solder the black glue tabs to the positive and negative tabs of the charged battery body 1, so that it has the ability to repackage;

[0046] S2, cut a lithium sheet with a certain width, the second tab 21 is also a vinyl tab, wind the lithium sheet around one end of the vinyl tab and press it tightly to make the two tightly combined, which is equivalent to the second tab 21 and the participating The specific electrode 2 is integrally formed with a lithium strip, and then a layer of separator 22 is wrapped around the lithium sheet with a stop glue. Both the separator 22 and the lithium sheet are set in the aluminum-plastic film, but attention should be paid to the stop glue not being close to the end to prevent it from blocking the electrolyte. The black glue tab part is exposed outside the aluminum-plastic film;

[0047] S3, cutting a new aluminum-plastic film (that is, the battery...

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Abstract

The invention provides a three-electrode battery and a preparation method thereof. The preparation method comprises the following steps: S1, first tabs are connected to a positive tab and a negative tab of a charged battery cell body respectively, and the first tabs are partially exposed out of a battery shell; S2, a reference electrode is coated with a diaphragm and connected with a second tab, part of the second tab is exposed out of the battery shell, the diaphragm is arranged in the battery shell, and the reference electrode and the charged battery cell body are kept in a non-contact state; and S3, the three-electrode battery is packaged, then electrolyte is injected, and the injection coefficient of the electrolyte is 1.5-3 g / Ah; and then shelving aging and secondary sealing processesare carried out to finish the preparation of the three-electrode battery. Compared with the prior art, the charged lithium battery is reassembled on the basis of reserving the original battery cell body, so that a new three-electrode battery is obtained, and the problem that the charged lithium battery cannot be analyzed and detected in a targeted manner at present is solved.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a three-electrode battery and a preparation method thereof. Background technique [0002] Due to the advantages of small size, high energy density, and no pollution to the environment, lithium-ion batteries have been more and more widely used in various electronic products and new energy vehicle industries. Especially with the development of new energy vehicles, lithium-ion batteries are growing explosively. However, the current lithium battery industry has higher and higher requirements for lithium-ion battery life, safety and other performance. However, the interior of the battery is very complicated, and it will be analyzed in detail. The technical means still need to be further improved. [0003] During the use of lithium-ion batteries, the electrolyte of the battery and the positive and negative electrode materials slowly undergo side reactions, such as electrolyte cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M10/48H01M2/26
CPCH01M10/058H01M10/48H01M50/531Y02E60/10Y02P70/50
Inventor 张爱莲付奥朱坤庆计阳夏小勇
Owner 东莞维科电池有限公司
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