Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for producing one-sided film pole piece for lithium secondary battery

A lithium secondary battery and production method technology, applied to battery electrodes, electrode manufacturing, devices for coating liquid on the surface, etc., can solve the problems of cumbersome operation process, curling, and lack of production methods for single-membrane pole pieces, and achieve improved Effects of energy density, production cost reduction, and battery thickness reduction

Active Publication Date: 2010-01-27
WANXIANG 123 CO LTD
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the serious curling problem caused by the rolling process of the substrate, most of the existing solutions are concentrated in the coating process, such as Chinese patent applications CN200610061106.8 and CN 20071018523.1 provide a method for coating the pole piece to obtain a uniform coating film. Pole piece; CN200810066074 discloses a method for making the positive pole piece of a lithium-ion battery, which mainly solves the problem of coating adhesion and adhesion, thereby improving the processing performance of the pole piece. Proven and effective method for the production of membrane pole pieces
Therefore, in the prior art, there is a lack of a production method that specifically solves the problem of single-membrane pole pieces for lithium secondary batteries.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing one-sided film pole piece for lithium secondary battery
  • Method for producing one-sided film pole piece for lithium secondary battery
  • Method for producing one-sided film pole piece for lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare positive and negative electrode raw materials according to formula 1 in Table 1 and Table 2, and add solvent to prepare positive and negative electrode slurry with uniform solid-liquid two-phase mixing and dispersion according to conventional methods.

[0037] Coat the prepared positive and negative slurry on one surface of the metal aluminum foil (e.g. Figure 4 Shown), and then dry. Take two rolls of single-sided mask pole piece and stack the two rolls of single-sided mask pole piece (such as Figure 5 As shown), the metal foil faces of the two rolls of single-sided film pole pieces are opposed, and the corresponding film layers should be aligned. Then send the stacked two rolls of single-face mask pole piece rolls into the rolling machine for rolling treatment (such as Image 6 Shown), the rolling process parameters are: rolling speed is 4-6 m / min, the compaction density of the positive electrode single-sided membrane pole piece is 2.0-3.6g / cm 3 , The compaction ...

Embodiment 2

[0039] Prepare positive and negative electrode materials according to formula 2 in Table 1 and Table 2, and add solvent to prepare positive and negative electrode slurry with uniform solid-liquid two-phase mixing and dispersion according to conventional methods.

[0040] Coat the prepared positive and negative slurry on one surface of the metal copper foil (e.g. Figure 4 Shown), and then dry. Take two rolls of single-sided mask pole piece rolls prepared, and stack the two rolls of single-sided mask pole piece (such as Figure 5 As shown), the metal foil faces of the two rolls of single-sided film pole pieces are opposed, and the corresponding film layers should be aligned. Then send the stacked two rolls of single-face mask pole piece rolls into the rolling machine for rolling treatment (such as Image 6 Shown), the rolling process parameters are: rolling speed is 4-6 m / min, the compaction density of the positive electrode single-sided membrane pole piece is 2.0-3.6g / cm 3 , The c...

Embodiment 3

[0042] Prepare positive and negative electrode raw materials according to formula 3 in Table 1 and Table 2, and add solvent to prepare positive and negative electrode slurry with uniform solid-liquid two-phase mixing and dispersion according to conventional methods.

[0043] Coat the prepared positive and negative slurry on one surface of the metal aluminum foil (e.g. Figure 4 Shown), and then dry. Take a roll of prepared single-sided mask pole piece roll and fold it in half (such as Figure 7 As shown), make the metal foil faces of the single-sided film pole pieces face each other, and the corresponding film layers should be aligned. Then the single-sided film pole piece roll folded in half is sent to the rolling machine for rolling treatment (such as Figure 8 Shown), the rolling process parameters are: rolling speed is 4-6 m / min, the compaction density of the positive electrode single-sided membrane pole piece is 2.0-3.6g / cm 3 , The compaction density of the negative electrod...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing a one-sided film pole piece for a lithium secondary battery, which comprises the following steps: sequentially coating, drying and rolling a metal substrate, wherein the coating process is one side coating, and crystalline flake graphite is added to anode materials and cathode materials for coating; and the coated and dried substrate is folded or two layers of one-sided film substrates are overlapped to enable the uncoated metal foil surfaces opposite to each other and then rolling process is followed. The invention effectively solves the problem of severe coiling of the one-sided film pole piece for the lithium secondary battery in the manufacturing process. The one-sided film pole piece can be widely used for the model design of the lithium secondary battery. The one-sided film pole piece can be used for reducing the thickness of the lithium battery, increasing the energy density of the lithium battery and reducing the cost of the battery, and is especially suitable for producing ultra-thin polymer (flexible packing) lithium batteries.

Description

Technical field [0001] The invention relates to a lithium ion battery, in particular to a production method of a single-sided membrane pole piece for a lithium secondary battery. Background technique [0002] The current production process of lithium secondary battery positive and negative plates is as follows: firstly, the positive or negative electrode powder, conductive agent, solvent, binder, etc. are mixed to prepare a solid-liquid two-phase uniformly dispersed slurry, and then the slurry is coated The two surfaces of the metal foil are then dried and rolled, and then cut and formed into the battery assembly process. The pole piece rolling process is as attached figure 1 Shown. [0003] As the application fields of lithium secondary batteries become wider and wider, the market has more and more diversified requirements, such as reducing thickness, increasing energy density, and ultra-thin polymer (soft package) lithium batteries. This gave birth to a new type of pole piece s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04B05D7/24H01M4/62B21C23/00
CPCY02E60/12Y02E60/10
Inventor 田江涛朱修锋
Owner WANXIANG 123 CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com