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Unit high-capacity polymer lithium ion battery positive plate and production method thereof

A lithium-ion battery and polymer technology, which is applied in electrode manufacturing, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problem of easy displacement of positive electrode sheets and separators, and achieve thinner thickness, less brittle cracking, and safety. The effect of security and reliability assurance

Inactive Publication Date: 2016-09-07
程建聪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The application provides a positive electrode sheet of a monomer large-capacity polymer lithium-ion battery and its manufacturing method, provides a new method for preparing the positive electrode sheet, and solves the problem of easy displacement between the positive electrode sheet and the separator in the prior art. question

Method used

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  • Unit high-capacity polymer lithium ion battery positive plate and production method thereof
  • Unit high-capacity polymer lithium ion battery positive plate and production method thereof
  • Unit high-capacity polymer lithium ion battery positive plate and production method thereof

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Embodiment 1

[0033] 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:

[0034] S1: a positive electrode sheet manufacturing step, used to prepare the positive electrode sheet.

[0035] S2: a negative electrode sheet manufacturing step, for preparing the negative electrode sheet.

[0036] S3: The diaphragm membrane manufacturing step, which is used to coat the prepared diaphragm slurry on the polyester film to prepare the diaphragm membrane.

[0037] S4: Assembly step.

[0038] Please refer to image 3 , the assembly step (S4) includes the following sub-steps:

[0039] S1.1: Lay the diaphragm membranes on the surface of the positive electrode sheet respectively.

[0040] 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 d...

Embodiment 2

[0049] 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:

[0050] 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.

[0051] Step 2.2: Coating the current collector treatment slurry on the surface of the current collector.

[0052] 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

[0071] 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:

[0072] 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.

[0073] Step 3.2: Coating the current collector treatment slurry on the surface of the current collector.

[0074] 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 unit high-capacity polymer lithium ion battery positive plate and a production method thereof. After positive electrode slurry is prepared, the positive electrode slurry is coated on a polyester film, and thereby the positive electrode film is obtained, and then the positive electrode film is bound with a prepared current collector in a hot pressing manner to form the positive plate. The preparation method of the positive plate has the advantages of being simple to operate and easy to implement; the coating on the current collector can be integrally fused with the coating on the positive electrode film in the hot pressing manner, and meanwhile, by heating and pressurizing, the positive plate can be thinned, the interior of the positive plate is not prone to crack, and the binding effect between the positive electrode powder is more stable, so that the positive plate can be large in size, and the high capacity of the unit battery can be achieved.

Description

technical field [0001] The present application relates to the technical field of lithium-ion battery manufacturing, and in particular to a positive electrode sheet of a single high-capacity polymer lithium-ion battery 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 batt...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/13H01M4/139H01M4/04H01M10/0525
CPCH01M4/0402H01M4/043H01M4/13H01M4/139H01M4/62H01M10/0525Y02E60/10
Inventor 程建聪
Owner 程建聪