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Method for manufacturing laminated type soft battery cell for in-situ XRD (X-Ray Diffraction) testing

A manufacturing method and a laminated technology, which are applied in electrode manufacturing, electrolyte storage battery manufacturing, circuits, etc., can solve the problems of large influence of XRD diffraction background, complex overall structure, complex manufacturing, etc., and achieve simple and easy opening and preparation method Simple operation and little background effect

Inactive Publication Date: 2017-05-24
DONGGUAN MCNAIR NEW POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the deduction method is often used, and the positive electrode plate made of metal must be opened and sealed. The electrode to be tested often needs to be specially made, such as opening and thinning, and the battery generally needs to be matched with a specific XRD test chamber. Or the sealing box, which is relatively complicated to make, and the background of XRD diffraction is greatly affected; for example, the in-situ XRD battery test sealing box invented by Huanggang Normal University (application number: 20150906239.X) uses a special battery consisting of positive electrode cover, positive electrode sheet, Diaphragm, negative electrode sheet and negative electrode cover, etc., and a 12mm diameter circular hole is set on the positive electrode cover. X-rays enter the reaction surface of the positive electrode through the circular hole, and there must be very strong background peak interference.
An in-situ XRD reaction chamber for testing the electrochemical reaction process invented by Guangxi Normal University (application number: 201410624775.6). The battery must be connected to the reaction chamber for use, and its overall structure is complex and difficult to operate.

Method used

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  • Method for manufacturing laminated type soft battery cell for in-situ XRD (X-Ray Diffraction) testing
  • Method for manufacturing laminated type soft battery cell for in-situ XRD (X-Ray Diffraction) testing

Examples

Experimental program
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Embodiment 1

[0025] Please refer to figure 1 and figure 2 , a manufacturing method of a laminated soft-packed battery cell for in-situ XRD testing of the present invention, comprising the following steps:

[0026] 01. Prepare a slurry with a mass fraction of the binder of not less than 5% and a positive electrode solid content of 40% to 60%. Specifically, the active material, conductive carbon SP, binder, and powder are added and mixed evenly, and then an appropriate amount of NMP is added to stir, wherein the active material may be lithium iron phosphate powder. More specifically, in terms of mass fraction, the lithium iron phosphate powder accounts for 80%, the conductive carbon SP accounts for 10%, and the binder accounts for 10%. The solid content of the NMP is controlled at 50%, and the viscosity is 8000 mPa.s. It should be noted that the stirring time can be set to 1-2 hours, and the adhesive is PVDF or PTFE.

[0027] 02. Coat the pole piece on perforated aluminum foil, non-poro...

Embodiment 2

[0033] The only difference between Example 2 and Example 1 is that: the lithium iron phosphate powder in step 01 accounts for 85%, the conductive carbon SP accounts for 10%, and the adhesive PTFE accounts for 5%. For other processes, please refer to Example 1. description, which will not be repeated here.

Embodiment 3

[0035]The only difference between Example 3 and Example 1 is that the lithium iron phosphate powder in step 01 accounts for 70%, the conductive carbon SP accounts for 10%, and the adhesive PVDF accounts for 20%. Referring to the description of Embodiment 1, details are not repeated here.

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Abstract

The invention relates to a method for manufacturing a laminated type soft battery cell, and in particular to a method for manufacturing a laminated type soft battery cell for in-situ XRD (X-Ray Diffraction) testing. The method comprises the following steps: preparing slurry of which the adhesive mass percentage is not less than 5% and the anode solid content is 40-60%; coating a pored aluminum foil, a pore-free copper foil or a lithium strip with a pole piece; manufacturing a positive plate and a negative plate of certain sizes, overlapping the positive plate, the negative plate and an isolating membrane in sequence, packaging with an aluminum plastic membrane without scouring pit so as to obtain a battery cell, opening the battery cell, and performing fixation sealing on the edge of the opening by using a leadless sealing plate; and baking the battery cell for 12+ / -0.5 hours in an environment of 85+ / -5 DEG C, and performing liquid injection, leaving to stand in vacuum, packaging and formation. The soft battery cell manufactured by using the method can be directly inserted into an XRD sample platform for in-situ testing, no extra sealing chamber is needed, and the method has the characteristics of simple manufacturing mode operation.

Description

technical field [0001] The invention relates to a preparation method of a laminated soft-packed cell, in particular to a preparation method of a laminated soft-packed cell for in-situ XRD testing. Background technique [0002] In recent years, the lithium battery industry has developed rapidly, especially the rapid development of power tools and electric vehicles. As a mature and efficient analysis and detection method, XRD technology plays an important role in the research of lithium-ion batteries. During the charging and discharging process of the battery, the crystal type and crystal parameters of the electrode material will change. In order to determine the specific changes of the electrode material during the charging and discharging process of the battery, we can use in-situ XRD to observe the electrode material in real time. Therefore, the intermediates generated during the electrochemical reaction can be inferred, and the reaction mechanism can be inferred from thes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058H01M4/139H01M4/04H01M4/62H01M2/02H01M2/08
CPCH01M4/0404H01M4/139H01M4/621H01M10/058H01M50/116H01M50/183Y02E60/10Y02P70/50
Inventor 蔡其文刘继策张凤玲谢金玲邓耀明宋晓娜常嵩张新河李中廷赵玲
Owner DONGGUAN MCNAIR NEW POWER
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