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Manufacturing method of monomer high-capacity polymer lithium-ion battery

A technology of lithium-ion batteries and manufacturing methods, which is applied to battery components, circuits, electrical components, etc., can solve the problems of easy displacement of positive and negative plates and diaphragms of batteries, and achieve safety and reliability guarantees and product guarantees Quality, the effect of increasing the conductivity

Active Publication Date: 2019-08-16
程建聪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This application provides a single high-capacity polymer lithium-ion battery diaphragm and its manufacturing method, provides a new diaphragm preparation method, and solves the problem of easy displacement between the positive and negative electrodes of the battery and the diaphragm in the prior art And other issues

Method used

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  • Manufacturing method of monomer high-capacity polymer lithium-ion battery
  • Manufacturing method of monomer high-capacity polymer lithium-ion battery
  • Manufacturing method of monomer high-capacity polymer lithium-ion battery

Examples

Experimental program
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Embodiment 1

[0048] Please refer to figure 2 , the present embodiment provides a method for manufacturing a monomer high-capacity polymer lithium-ion battery, comprising the following steps:

[0049] S1: a positive electrode sheet manufacturing step, used to prepare the positive electrode sheet.

[0050] S2: a negative electrode sheet manufacturing step, for preparing the negative electrode sheet.

[0051] S3: a diaphragm membrane manufacturing step, for coating the prepared diaphragm slurry on a polyester film to prepare a diaphragm membrane.

[0052] S4: Assembly step.

[0053] Please refer to image 3 , the assembly step (S4) includes the following sub-steps:

[0054] S1.1: Lay the diaphragm membranes on the surface of the positive electrode sheet respectively.

[0055] S1.2: Press the diaphragm and the positive electrode together by hot pressing. In this embodiment, a temperature of 100-140° C. and a pressure of 1-20T (for example, 10T) can be used to press the diaphragm and the p...

Embodiment 2

[0064] Please refer to Figure 4 , The present embodiment also provides a method for manufacturing a positive electrode sheet of a monomer large-capacity polymer lithium-ion battery (ie, the positive electrode sheet manufacturing step S1 in the first embodiment above), which includes the following steps:

[0065] Step 2.1: preparing a current collector and a current collector treatment slurry, the current collector treatment slurry at least includes a conductive agent. Usually, aluminum foil is used as the positive electrode current collector.

[0066] Step 2.2: Coating the current collector treatment slurry on the surface of the current collector.

[0067] Step 2.3: preparing positive electrode slurry, the positive electrode slurry at least includes positive electrode active material, conductive agent and positive electrode polymer. Among them, lithium cobalt oxide, lithium iron phosphate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate, lithium manganate, ...

Embodiment 3

[0086] Please refer to Figure 7 , The present embodiment also provides a method for manufacturing a negative electrode sheet of a monomer large-capacity polymer lithium-ion battery (ie, the negative electrode sheet manufacturing step S2 in the first embodiment above), which includes the following steps:

[0087] Step 3.1: preparing a current collector and a current collector treatment slurry, the current collector treatment slurry at least includes a conductive agent. Usually, copper foil is used as the negative electrode current collector.

[0088] Step 3.2: Coating the current collector treatment slurry on the surface of the current collector.

[0089]Step 3.3: preparing negative electrode slurry, the negative electrode slurry at least includes negative electrode active material, conductive agent and negative electrode polymer. Among them, the negative electrode active material can be carbon materials such as artificial graphite, natural graphite, hard carbon, mesocarbon ...

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Abstract

The invention discloses a single high-capacity polymer lithium ion battery separator and a manufacturing method thereof. After the separator slurry is prepared, the separator slurry is first coated on a polyester film to obtain a separator membrane. In this diaphragm preparation method, the diaphragm slurry is coated on the substrate polyester film, and the diaphragm diaphragm flows into the subsequent production process. Because the polyester film material is relatively hard, the mechanical strength of the diaphragm diaphragm is much stronger than the existing The PP or PE diaphragm in the technology, the diaphragm diaphragm is easier to cut and is not easy to wrinkle, which can not only improve production efficiency and ensure product quality, but also can be used in conjunction with large-size pole pieces to achieve large-capacity single cells .

Description

technical field [0001] The present application relates to the technical field of lithium-ion battery manufacturing, in particular to a single high-capacity polymer lithium-ion battery diaphragm and a manufacturing method thereof. Background technique [0002] With the development of the new energy automobile industry, more and more attention is paid to the endurance of automobiles. How to improve the endurance of automobiles is also a technical difficulty that needs to be tackled in the industry. In order to improve the battery life of the car, it is mainly needed in the automotive industry, and it can also be applied to energy storage and electricity to increase the capacity of the battery. Therefore, the application of large-capacity batteries was born. Moreover, large-capacity batteries can not only be used in power and other fields. [0003] Please refer to figure 1 , is a schematic diagram of the structure of a single cell in a lithium-ion battery. [0004] The batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16H01M50/403H01M50/411H01M50/46H01M50/497
CPCH01M50/409H01M50/403Y02E60/10
Inventor 程建聪
Owner 程建聪
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